home *** CD-ROM | disk | FTP | other *** search
Unknown | 1993-10-19 | 27.1 KB |
open in:
MacOS 8.1
|
Win98
|
DOS
view JSON data
|
view as text
This file was not able to be converted.
This format is not currently supported by dexvert.
Confidence | Program | Detection | Match Type | Support
|
---|
100%
| file
| data
| default
|
|
hex view+--------+-------------------------+-------------------------+--------+--------+
|00000000| 88 00 00 00 f4 04 00 00 | 85 07 00 00 8f 0b 00 00 |........|........|
|00000010| cc 0d 00 00 51 10 00 00 | c9 15 00 00 26 18 00 00 |....Q...|....&...|
|00000020| c5 1b 00 00 b4 1e 00 00 | f4 21 00 00 a6 28 00 00 |........|.!...(..|
|00000030| 20 2e 00 00 0b 31 00 00 | 0c 36 00 00 b6 37 00 00 | ....1..|.6...7..|
|00000040| 88 39 00 00 18 3c 00 00 | 3a 3e 00 00 68 40 00 00 |.9...<..|:>..h@..|
|00000050| b0 41 00 00 f2 43 00 00 | 54 46 00 00 2e 48 00 00 |.A...C..|TF...H..|
|00000060| 64 4b 00 00 5a 4d 00 00 | 63 4f 00 00 e6 54 00 00 |dK..ZM..|cO...T..|
|00000070| d2 58 00 00 1e 5c 00 00 | 2c 60 00 00 5d 64 00 00 |.X...\..|,`..]d..|
|00000080| 24 69 00 00 ff ff ff ff | 5b 04 4c 6f 62 73 74 65 |$i......|[.Lobste|
|00000090| 72 20 42 72 61 69 6e 0a | 0a 4c 4f 42 53 54 45 52 |r Brain.|.LOBSTER|
|000000a0| 20 42 52 41 49 4e 20 0a | 09 4c 6f 62 73 74 65 72 | BRAIN .|.Lobster|
|000000b0| 73 20 68 61 76 65 20 73 | 69 6d 70 6c 65 20 62 72 |s have s|imple br|
|000000c0| 61 69 6e 73 2e 20 41 20 | 6c 6f 62 73 74 65 72 20 |ains. A |lobster |
|000000d0| 62 72 61 69 6e 20 63 6f | 6e 73 69 73 74 73 20 6f |brain co|nsists o|
|000000e0| 66 20 61 20 64 65 6e 73 | 65 20 63 6f 6c 6c 65 63 |f a dens|e collec|
|000000f0| 74 69 6f 6e 20 6f 66 20 | 6e 65 72 76 65 73 20 63 |tion of |nerves c|
|00000100| 61 6c 6c 65 64 20 61 20 | 67 61 6e 67 6c 69 6f 6e |alled a |ganglion|
|00000110| 2e 20 54 68 65 20 67 61 | 6e 67 6c 69 6f 6e 20 73 |. The ga|nglion s|
|00000120| 69 74 73 20 61 74 20 74 | 68 65 20 65 6e 64 20 6f |its at t|he end o|
|00000130| 66 20 61 20 6c 6f 6e 67 | 20 73 74 72 69 6e 67 20 |f a long| string |
|00000140| 6f 66 20 6e 65 72 76 65 | 20 66 69 62 65 72 73 20 |of nerve| fibers |
|00000150| 74 68 61 74 20 63 6f 6e | 6e 65 63 74 20 74 68 65 |that con|nect the|
|00000160| 20 62 72 61 69 6e 20 74 | 6f 20 74 68 65 20 72 65 | brain t|o the re|
|00000170| 73 74 20 6f 66 20 74 68 | 65 20 6c 6f 62 73 74 65 |st of th|e lobste|
|00000180| 72 27 73 20 62 6f 64 79 | 2e 20 54 68 65 20 63 6f |r's body|. The co|
|00000190| 6d 62 69 6e 61 74 69 6f | 6e 20 6f 66 20 74 68 65 |mbinatio|n of the|
|000001a0| 20 62 72 61 69 6e 20 61 | 6e 64 20 74 68 65 73 65 | brain a|nd these|
|000001b0| 20 6c 6f 6e 67 20 6e 65 | 72 76 65 73 20 69 73 20 | long ne|rves is |
|000001c0| 63 61 6c 6c 65 64 20 74 | 68 65 20 63 65 6e 74 72 |called t|he centr|
|000001d0| 61 6c 20 6e 65 72 76 6f | 75 73 20 73 79 73 74 65 |al nervo|us syste|
|000001e0| 6d 2e 20 0a 09 41 73 20 | 77 69 74 68 20 6f 74 68 |m. ..As |with oth|
|000001f0| 65 72 20 61 6e 69 6d 61 | 6c 73 2c 20 74 68 65 20 |er anima|ls, the |
|00000200| 6c 6f 62 73 74 65 72 27 | 73 20 63 65 6e 74 72 61 |lobster'|s centra|
|00000210| 6c 20 6e 65 72 76 6f 75 | 73 20 73 79 73 74 65 6d |l nervou|s system|
|00000220| 20 74 72 61 6e 73 6d 69 | 74 73 20 74 69 6e 79 20 | transmi|ts tiny |
|00000230| 65 6c 65 63 74 72 69 63 | 61 6c 20 6d 65 73 73 61 |electric|al messa|
|00000240| 67 65 73 20 62 65 74 77 | 65 65 6e 20 74 68 65 20 |ges betw|een the |
|00000250| 64 69 66 66 65 72 65 6e | 74 20 70 61 72 74 73 20 |differen|t parts |
|00000260| 6f 66 20 74 68 65 20 62 | 6f 64 79 20 61 6e 64 20 |of the b|ody and |
|00000270| 62 72 61 69 6e 2e 20 46 | 6f 72 20 69 6e 73 74 61 |brain. F|or insta|
|00000280| 6e 63 65 2c 20 6e 65 72 | 76 65 73 20 69 6e 20 74 |nce, ner|ves in t|
|00000290| 68 65 20 6c 6f 62 73 74 | 65 72 27 73 20 6c 65 67 |he lobst|er's leg|
|000002a0| 73 2c 20 65 79 65 73 20 | 61 6e 64 20 73 68 65 6c |s, eyes |and shel|
|000002b0| 6c 20 61 72 65 20 63 6f | 6e 73 74 61 6e 74 6c 79 |l are co|nstantly|
|000002c0| 20 73 65 6e 64 69 6e 67 | 20 6d 65 73 73 61 67 65 | sending| message|
|000002d0| 73 20 74 6f 20 74 68 65 | 20 6c 6f 62 73 74 65 72 |s to the| lobster|
|000002e0| 27 73 20 62 72 61 69 6e | 20 61 62 6f 75 74 20 69 |'s brain| about i|
|000002f0| 74 73 20 65 6e 76 69 72 | 6f 6e 6d 65 6e 74 2e 20 |ts envir|onment. |
|00000300| 54 68 65 20 62 72 61 69 | 6e 2c 20 69 6e 20 74 75 |The brai|n, in tu|
|00000310| 72 6e 2c 20 73 6f 72 74 | 73 20 74 68 72 6f 75 67 |rn, sort|s throug|
|00000320| 68 20 74 68 65 73 65 20 | 6d 65 73 73 61 67 65 73 |h these |messages|
|00000330| 20 61 6e 64 20 72 65 61 | 63 74 73 20 61 75 74 6f | and rea|cts auto|
|00000340| 6d 61 74 69 63 61 6c 6c | 79 20 74 6f 20 74 68 6f |maticall|y to tho|
|00000350| 73 65 20 6d 65 73 73 61 | 67 65 73 20 72 65 71 75 |se messa|ges requ|
|00000360| 69 72 69 6e 67 20 73 6f | 6d 65 20 6b 69 6e 64 20 |iring so|me kind |
|00000370| 6f 66 20 61 63 74 69 6f | 6e 2e 20 54 68 69 73 20 |of actio|n. This |
|00000380| 74 79 70 65 20 6f 66 20 | 72 65 73 70 6f 6e 73 65 |type of |response|
|00000390| 20 69 73 20 63 61 6c 6c | 65 64 20 61 6e 20 49 4e | is call|ed an IN|
|000003a0| 53 54 49 4e 43 54 20 62 | 65 63 61 75 73 65 20 74 |STINCT b|ecause t|
|000003b0| 68 65 20 6c 6f 62 73 74 | 65 72 20 64 6f 65 73 6e |he lobst|er doesn|
|000003c0| 27 74 20 61 63 74 75 61 | 6c 6c 79 20 74 68 69 6e |'t actua|lly thin|
|000003d0| 6b 20 61 62 6f 75 74 20 | 74 68 65 20 61 63 74 69 |k about |the acti|
|000003e0| 6f 6e 20 62 65 66 6f 72 | 65 20 64 6f 69 6e 67 20 |on befor|e doing |
|000003f0| 69 74 2e 20 49 66 20 74 | 68 65 20 6c 6f 62 73 74 |it. If t|he lobst|
|00000400| 65 72 27 73 20 65 79 65 | 20 73 65 6e 64 73 20 61 |er's eye| sends a|
|00000410| 20 76 69 73 75 61 6c 20 | 6d 65 73 73 61 67 65 20 | visual |message |
|00000420| 74 6f 20 74 68 65 20 62 | 72 61 69 6e 2c 20 73 61 |to the b|rain, sa|
|00000430| 79 2c 20 74 68 61 74 20 | 61 20 66 61 73 74 2d 6d |y, that |a fast-m|
|00000440| 6f 76 69 6e 67 20 6f 62 | 6a 65 63 74 20 69 73 20 |oving ob|ject is |
|00000450| 61 70 70 72 6f 61 63 68 | 69 6e 67 2c 20 74 68 65 |approach|ing, the|
|00000460| 20 6c 6f 62 73 74 65 72 | 27 73 20 62 72 61 69 6e | lobster|'s brain|
|00000470| 20 6d 69 67 68 74 20 72 | 65 73 70 6f 6e 64 20 62 | might r|espond b|
|00000480| 79 20 73 65 6e 64 69 6e | 67 20 61 6e 20 65 6c 65 |y sendin|g an ele|
|00000490| 63 74 72 69 63 61 6c 20 | 6d 65 73 73 61 67 65 20 |ctrical |message |
|000004a0| 74 6f 20 74 68 65 20 74 | 61 69 6c 2c 20 22 74 65 |to the t|ail, "te|
|000004b0| 6c 6c 69 6e 67 22 20 74 | 68 65 20 74 61 69 6c 20 |lling" t|he tail |
|000004c0| 74 6f 20 63 6c 6f 73 65 | 20 72 61 70 69 64 6c 79 |to close| rapidly|
|000004d0| 20 61 6e 64 20 70 72 6f | 70 65 6c 20 74 68 65 20 | and pro|pel the |
|000004e0| 6c 6f 62 73 74 65 72 20 | 74 6f 20 73 61 66 65 74 |lobster |to safet|
|000004f0| 79 2e 20 0a 80 02 4c 6f | 62 73 74 65 72 20 47 69 |y. ...Lo|bster Gi|
|00000500| 6c 6c 73 0a 0a 4c 4f 42 | 53 54 45 52 20 47 49 4c |lls..LOB|STER GIL|
|00000510| 4c 53 20 0a 09 54 68 65 | 20 67 69 6c 6c 73 20 6f |LS ..The| gills o|
|00000520| 66 20 61 20 6c 6f 62 73 | 74 65 72 20 66 75 6e 63 |f a lobs|ter func|
|00000530| 74 69 6f 6e 20 6d 75 63 | 68 20 74 68 65 20 77 61 |tion muc|h the wa|
|00000540| 79 20 61 20 66 69 73 68 | 27 73 20 67 69 6c 6c 73 |y a fish|'s gills|
|00000550| 20 64 6f 2e 20 45 61 63 | 68 20 67 69 6c 6c 20 69 | do. Eac|h gill i|
|00000560| 73 20 6d 61 64 65 20 6f | 66 20 61 20 66 69 6e 65 |s made o|f a fine|
|00000570| 2c 20 66 65 61 74 68 65 | 72 79 20 6d 61 74 65 72 |, feathe|ry mater|
|00000580| 69 61 6c 20 74 68 61 74 | 20 69 73 20 66 69 6c 6c |ial that| is fill|
|00000590| 65 64 20 77 69 74 68 20 | 74 69 6e 79 20 62 6c 6f |ed with |tiny blo|
|000005a0| 6f 64 20 76 65 73 73 65 | 6c 73 2e 20 54 68 65 20 |od vesse|ls. The |
|000005b0| 67 69 6c 6c 73 20 61 72 | 65 20 61 74 74 61 63 68 |gills ar|e attach|
|000005c0| 65 64 20 6e 65 61 72 20 | 74 68 65 20 61 72 65 61 |ed near |the area|
|000005d0| 20 77 68 65 72 65 20 61 | 20 6c 6f 62 73 74 65 72 | where a| lobster|
|000005e0| 27 73 20 6c 65 67 73 20 | 61 72 65 20 61 74 74 61 |'s legs |are atta|
|000005f0| 63 68 65 64 20 74 6f 20 | 74 68 65 20 62 6f 64 79 |ched to |the body|
|00000600| 2e 20 54 68 65 20 6d 6f | 76 65 6d 65 6e 74 20 6f |. The mo|vement o|
|00000610| 66 20 74 68 65 20 6c 6f | 62 73 74 65 72 27 73 20 |f the lo|bster's |
|00000620| 6c 65 67 73 20 68 65 6c | 70 73 20 62 72 69 6e 67 |legs hel|ps bring|
|00000630| 20 77 61 74 65 72 20 74 | 6f 20 74 68 65 20 67 69 | water t|o the gi|
|00000640| 6c 6c 73 2e 20 41 73 20 | 74 68 65 20 77 61 74 65 |lls. As |the wate|
|00000650| 72 20 70 61 73 73 65 73 | 20 6f 76 65 72 20 74 68 |r passes| over th|
|00000660| 65 20 67 69 6c 6c 73 2c | 20 74 68 65 20 62 6c 6f |e gills,| the blo|
|00000670| 6f 64 20 76 65 73 73 65 | 6c 73 20 69 6e 20 65 61 |od vesse|ls in ea|
|00000680| 63 68 20 67 69 6c 6c 20 | 61 62 73 6f 72 62 20 74 |ch gill |absorb t|
|00000690| 68 65 20 6f 78 79 67 65 | 6e 20 66 72 6f 6d 20 74 |he oxyge|n from t|
|000006a0| 68 65 20 77 61 74 65 72 | 20 61 6e 64 20 72 65 6c |he water| and rel|
|000006b0| 65 61 73 65 20 63 61 72 | 62 6f 6e 20 64 69 6f 78 |ease car|bon diox|
|000006c0| 69 64 65 2c 20 77 68 69 | 63 68 20 69 73 20 61 20 |ide, whi|ch is a |
|000006d0| 62 79 70 72 6f 64 75 63 | 74 20 6f 66 20 72 65 73 |byproduc|t of res|
|000006e0| 70 69 72 61 74 69 6f 6e | 2e 20 54 68 65 20 6f 78 |piration|. The ox|
|000006f0| 79 67 65 6e 20 69 73 20 | 74 68 65 6e 20 63 61 72 |ygen is |then car|
|00000700| 72 69 65 64 20 69 6e 20 | 74 68 65 20 62 6c 6f 6f |ried in |the bloo|
|00000710| 64 20 74 6f 20 74 68 65 | 20 6f 74 68 65 72 20 70 |d to the| other p|
|00000720| 61 72 74 73 20 6f 66 20 | 74 68 65 20 6c 6f 62 73 |arts of |the lobs|
|00000730| 74 65 72 27 73 20 62 6f | 64 79 2c 20 77 68 65 72 |ter's bo|dy, wher|
|00000740| 65 20 69 74 20 69 73 20 | 75 73 65 64 20 66 6f 72 |e it is |used for|
|00000750| 20 61 63 74 69 76 69 74 | 69 65 73 20 73 75 63 68 | activit|ies such|
|00000760| 20 61 73 20 6d 6f 76 65 | 6d 65 6e 74 2c 20 67 72 | as move|ment, gr|
|00000770| 6f 77 74 68 20 61 6e 64 | 20 64 69 67 65 73 74 69 |owth and| digesti|
|00000780| 6f 6e 2e 20 0a f9 03 4c | 6f 62 73 74 65 72 20 47 |on. ...L|obster G|
|00000790| 6f 6e 61 64 0a 0a 4c 4f | 42 53 54 45 52 20 47 6f |onad..LO|BSTER Go|
|000007a0| 6e 61 64 20 0a 09 54 68 | 69 73 20 6c 6f 6e 67 2c |nad ..Th|is long,|
|000007b0| 20 63 6f 6c 6f 72 66 75 | 6c 20 6f 72 67 61 6e 20 | colorfu|l organ |
|000007c0| 69 73 20 63 61 6c 6c 65 | 64 20 61 20 67 6f 6e 61 |is calle|d a gona|
|000007d0| 64 2e 20 49 74 20 69 73 | 20 75 73 65 64 20 62 79 |d. It is| used by|
|000007e0| 20 6c 6f 62 73 74 65 72 | 73 20 66 6f 72 20 72 65 | lobster|s for re|
|000007f0| 70 72 6f 64 75 63 74 69 | 6f 6e 2e 20 49 6e 20 66 |producti|on. In f|
|00000800| 65 6d 61 6c 65 20 6c 6f | 62 73 74 65 72 73 2c 20 |emale lo|bsters, |
|00000810| 74 68 65 20 67 6f 6e 61 | 64 20 70 72 6f 64 75 63 |the gona|d produc|
|00000820| 65 73 20 65 67 67 73 2e | 20 49 6e 20 6d 61 6c 65 |es eggs.| In male|
|00000830| 20 6c 6f 62 73 74 65 72 | 73 2c 20 69 74 20 70 72 | lobster|s, it pr|
|00000840| 6f 64 75 63 65 73 20 73 | 70 65 72 6d 2e 20 4c 69 |oduces s|perm. Li|
|00000850| 6b 65 20 6d 6f 73 74 20 | 6f 74 68 65 72 20 69 6e |ke most |other in|
|00000860| 76 65 72 74 65 62 72 61 | 74 65 73 2c 20 6c 6f 62 |vertebra|tes, lob|
|00000870| 73 74 65 72 73 20 72 65 | 70 72 6f 64 75 63 65 20 |sters re|produce |
|00000880| 62 79 20 6c 61 79 69 6e | 67 20 61 6e 64 20 66 65 |by layin|g and fe|
|00000890| 72 74 69 6c 69 7a 69 6e | 67 20 65 67 67 73 2e 20 |rtilizin|g eggs. |
|000008a0| 4f 6e 63 65 20 61 20 6c | 6f 62 73 74 65 72 27 73 |Once a l|obster's|
|000008b0| 20 65 67 67 73 20 61 72 | 65 20 66 65 72 74 69 6c | eggs ar|e fertil|
|000008c0| 69 7a 65 64 2c 20 74 68 | 65 79 20 61 72 65 20 6b |ized, th|ey are k|
|000008d0| 65 70 74 20 69 6e 20 61 | 20 73 6d 61 6c 6c 20 63 |ept in a| small c|
|000008e0| 68 61 6d 62 65 72 20 61 | 74 74 61 63 68 65 64 20 |hamber a|ttached |
|000008f0| 74 6f 20 74 68 65 20 6c | 6f 62 73 74 65 72 27 73 |to the l|obster's|
|00000900| 20 62 6f 64 79 2e 20 53 | 65 76 65 72 61 6c 20 77 | body. S|everal w|
|00000910| 65 65 6b 73 20 6c 61 74 | 65 72 2c 20 62 61 62 79 |eeks lat|er, baby|
|00000920| 20 6c 6f 62 73 74 65 72 | 73 2c 20 6b 6e 6f 77 6e | lobster|s, known|
|00000930| 20 61 73 20 6c 61 72 76 | 61 65 2c 20 65 6d 65 72 | as larv|ae, emer|
|00000940| 67 65 20 66 72 6f 6d 20 | 74 68 65 20 65 67 67 73 |ge from |the eggs|
|00000950| 2e 20 0a 09 44 75 72 69 | 6e 67 20 74 68 65 20 6c |. ..Duri|ng the l|
|00000960| 61 72 76 61 6c 20 73 74 | 61 67 65 20 6f 66 20 69 |arval st|age of i|
|00000970| 74 73 20 64 65 76 65 6c | 6f 70 6d 65 6e 74 2c 20 |ts devel|opment, |
|00000980| 61 20 6c 6f 62 73 74 65 | 72 20 6c 6f 6f 6b 73 20 |a lobste|r looks |
|00000990| 6e 6f 74 68 69 6e 67 20 | 6c 69 6b 65 20 69 74 20 |nothing |like it |
|000009a0| 77 69 6c 6c 20 61 73 20 | 61 6e 20 61 64 75 6c 74 |will as |an adult|
|000009b0| 2e 20 49 6e 73 74 65 61 | 64 20 6f 66 20 68 61 76 |. Instea|d of hav|
|000009c0| 69 6e 67 20 61 20 6c 6f | 6e 67 20 62 6f 64 79 20 |ing a lo|ng body |
|000009d0| 77 69 74 68 20 61 20 73 | 68 65 6c 6c 20 61 6e 64 |with a s|hell and|
|000009e0| 20 63 6c 61 77 73 2c 20 | 74 68 65 20 6c 6f 62 73 | claws, |the lobs|
|000009f0| 74 65 72 20 6c 61 72 76 | 61 20 69 73 20 61 6c 6d |ter larv|a is alm|
|00000a00| 6f 73 74 20 63 69 72 63 | 75 6c 61 72 2c 20 61 6e |ost circ|ular, an|
|00000a10| 64 20 69 74 20 68 61 73 | 20 6e 6f 20 74 61 69 6c |d it has| no tail|
|00000a20| 20 6f 72 20 72 65 63 6f | 67 6e 69 7a 61 62 6c 65 | or reco|gnizable|
|00000a30| 20 68 65 61 64 2e 20 57 | 69 74 68 6f 75 74 20 61 | head. W|ithout a|
|00000a40| 6e 79 20 6d 65 61 6e 73 | 20 6f 66 20 6d 6f 76 69 |ny means| of movi|
|00000a50| 6e 67 20 61 72 6f 75 6e | 64 2c 20 61 20 6c 6f 62 |ng aroun|d, a lob|
|00000a60| 73 74 65 72 20 6c 61 72 | 76 61 20 6d 75 73 74 20 |ster lar|va must |
|00000a70| 66 6c 6f 61 74 20 61 6c | 6f 6e 67 20 69 6e 20 74 |float al|ong in t|
|00000a80| 68 65 20 6f 63 65 61 6e | 20 63 75 72 72 65 6e 74 |he ocean| current|
|00000a90| 2e 20 4d 6f 73 74 20 6c | 6f 62 73 74 65 72 20 6c |. Most l|obster l|
|00000aa0| 61 72 76 61 65 20 65 6e | 64 20 75 70 20 61 73 20 |arvae en|d up as |
|00000ab0| 61 20 6d 65 61 6c 20 66 | 6f 72 20 73 6f 6d 65 20 |a meal f|or some |
|00000ac0| 6f 74 68 65 72 20 61 6e | 69 6d 61 6c 2e 20 41 73 |other an|imal. As|
|00000ad0| 20 74 68 65 20 6c 61 72 | 76 61 20 67 72 6f 77 73 | the lar|va grows|
|00000ae0| 2c 20 69 74 20 73 68 65 | 64 73 20 69 74 73 20 6f |, it she|ds its o|
|00000af0| 75 74 65 72 20 6c 61 79 | 65 72 20 6f 66 20 73 6b |uter lay|er of sk|
|00000b00| 69 6e 2e 20 54 68 69 73 | 20 70 72 6f 63 65 73 73 |in. This| process|
|00000b10| 20 69 73 20 63 61 6c 6c | 65 64 20 4d 4f 4c 54 49 | is call|ed MOLTI|
|00000b20| 4e 47 2e 20 57 69 74 68 | 20 65 61 63 68 20 6d 6f |NG. With| each mo|
|00000b30| 6c 74 69 6e 67 2c 20 6d | 6f 72 65 20 6f 66 20 74 |lting, m|ore of t|
|00000b40| 68 65 20 6c 6f 62 73 74 | 65 72 27 73 20 70 61 72 |he lobst|er's par|
|00000b50| 74 73 20 61 72 65 20 72 | 65 76 65 61 6c 65 64 20 |ts are r|evealed |
|00000b60| 75 6e 74 69 6c 20 61 20 | 72 65 63 6f 67 6e 69 7a |until a |recogniz|
|00000b70| 61 62 6c 65 20 6c 6f 62 | 73 74 65 72 20 66 69 6e |able lob|ster fin|
|00000b80| 61 6c 6c 79 20 61 70 70 | 65 61 72 73 2e 20 0a 2c |ally app|ears. .,|
|00000b90| 02 4c 6f 62 73 74 65 72 | 20 48 65 61 72 74 0a 0a |.Lobster| Heart..|
|00000ba0| 4c 4f 42 53 54 45 52 20 | 48 45 41 52 54 20 0a 09 |LOBSTER |HEART ..|
|00000bb0| 54 68 65 20 6c 6f 62 73 | 74 65 72 27 73 20 68 65 |The lobs|ter's he|
|00000bc0| 61 72 74 20 61 63 74 73 | 20 6c 69 6b 65 20 61 20 |art acts| like a |
|00000bd0| 73 6d 61 6c 6c 20 70 75 | 6d 70 20 77 68 69 63 68 |small pu|mp which|
|00000be0| 20 64 72 61 77 73 20 6f | 78 79 67 65 6e 2d 72 69 | draws o|xygen-ri|
|00000bf0| 63 68 20 62 6c 6f 6f 64 | 20 66 72 6f 6d 20 74 68 |ch blood| from th|
|00000c00| 65 20 67 69 6c 6c 73 20 | 61 6e 64 20 74 68 65 6e |e gills |and then|
|00000c10| 20 70 75 6d 70 73 20 69 | 74 20 74 6f 20 74 68 65 | pumps i|t to the|
|00000c20| 20 72 65 73 74 20 6f 66 | 20 74 68 65 20 6c 6f 62 | rest of| the lob|
|00000c30| 73 74 65 72 27 73 20 62 | 6f 64 79 2e 20 54 68 65 |ster's b|ody. The|
|00000c40| 20 62 6c 6f 6f 64 20 69 | 73 20 63 61 72 72 69 65 | blood i|s carrie|
|00000c50| 64 20 74 68 72 6f 75 67 | 68 20 61 20 77 65 62 20 |d throug|h a web |
|00000c60| 6f 66 20 63 6f 6e 6e 65 | 63 74 69 6e 67 20 62 6c |of conne|cting bl|
|00000c70| 6f 6f 64 20 76 65 73 73 | 65 6c 73 20 63 61 6c 6c |ood vess|els call|
|00000c80| 65 64 20 61 20 63 69 72 | 63 75 6c 61 74 6f 72 79 |ed a cir|culatory|
|00000c90| 20 73 79 73 74 65 6d 2e | 20 49 6e 20 6c 6f 62 73 | system.| In lobs|
|00000ca0| 74 65 72 73 2c 20 62 6c | 6f 6f 64 20 66 6c 6f 77 |ters, bl|ood flow|
|00000cb0| 73 20 66 72 6f 6d 20 74 | 68 65 20 6c 6f 62 73 74 |s from t|he lobst|
|00000cc0| 65 72 27 73 20 62 6f 64 | 79 20 74 69 73 73 75 65 |er's bod|y tissue|
|00000cd0| 73 20 69 6e 74 6f 20 61 | 20 6c 61 72 67 65 20 62 |s into a| large b|
|00000ce0| 6f 64 79 20 63 61 76 69 | 74 79 2c 20 6b 6e 6f 77 |ody cavi|ty, know|
|00000cf0| 6e 20 61 73 20 61 20 68 | 65 6d 6f 63 6f 65 6c 2c |n as a h|emocoel,|
|00000d00| 20 6c 6f 63 61 74 65 64 | 20 6e 65 61 72 20 74 68 | located| near th|
|00000d10| 65 20 6d 69 64 64 6c 65 | 20 6f 66 20 74 68 65 20 |e middle| of the |
|00000d20| 6c 6f 62 73 74 65 72 2e | 20 46 72 6f 6d 20 74 68 |lobster.| From th|
|00000d30| 65 20 68 65 6d 6f 63 6f | 65 6c 2c 20 74 68 65 20 |e hemoco|el, the |
|00000d40| 6c 6f 62 73 74 65 72 27 | 73 20 62 6c 6f 6f 64 20 |lobster'|s blood |
|00000d50| 66 6c 6f 77 73 20 69 6e | 74 6f 20 74 68 65 20 67 |flows in|to the g|
|00000d60| 69 6c 6c 73 2c 20 77 68 | 65 72 65 20 63 61 72 62 |ills, wh|ere carb|
|00000d70| 6f 6e 20 64 69 6f 78 69 | 64 65 20 69 73 20 72 65 |on dioxi|de is re|
|00000d80| 6c 65 61 73 65 64 20 62 | 79 20 74 68 65 20 6c 6f |leased b|y the lo|
|00000d90| 62 73 74 65 72 27 73 20 | 62 6c 6f 6f 64 20 63 65 |bster's |blood ce|
|00000da0| 6c 6c 73 20 61 6e 64 20 | 6f 78 79 67 65 6e 20 69 |lls and |oxygen i|
|00000db0| 73 20 61 62 73 6f 72 62 | 65 64 20 66 72 6f 6d 20 |s absorb|ed from |
|00000dc0| 74 68 65 20 77 61 74 65 | 72 2e 20 0a 72 02 4c 6f |the wate|r. .r.Lo|
|00000dd0| 62 73 74 65 72 20 53 74 | 6f 6d 61 63 68 0a 0a 4c |bster St|omach..L|
|00000de0| 4f 42 53 54 45 52 20 53 | 54 4f 4d 41 43 48 20 0a |OBSTER S|TOMACH .|
|00000df0| 09 4c 6f 62 73 74 65 72 | 73 20 64 6f 6e 27 74 20 |.Lobster|s don't |
|00000e00| 68 61 76 65 20 6a 75 73 | 74 20 6f 6e 65 20 73 74 |have jus|t one st|
|00000e10| 6f 6d 61 63 68 2c 20 62 | 75 74 20 74 77 6f 2e 20 |omach, b|ut two. |
|00000e20| 4c 69 6b 65 20 6d 61 6e | 79 20 61 6e 69 6d 61 6c |Like man|y animal|
|00000e30| 73 2c 20 74 68 65 20 6c | 6f 62 73 74 65 72 20 64 |s, the l|obster d|
|00000e40| 69 67 65 73 74 73 20 69 | 74 73 20 66 6f 6f 64 20 |igests i|ts food |
|00000e50| 69 6e 20 73 74 61 67 65 | 73 2e 20 46 6f 6f 64 20 |in stage|s. Food |
|00000e60| 70 61 73 73 65 73 20 74 | 68 72 6f 75 67 68 20 74 |passes t|hrough t|
|00000e70| 68 65 20 6d 6f 75 74 68 | 20 69 6e 74 6f 20 61 20 |he mouth| into a |
|00000e80| 73 74 72 61 69 67 68 74 | 20 64 69 67 65 73 74 69 |straight| digesti|
|00000e90| 76 65 20 74 72 61 63 74 | 2e 20 46 72 6f 6d 20 74 |ve tract|. From t|
|00000ea0| 68 65 20 64 69 67 65 73 | 74 69 76 65 20 74 72 61 |he diges|tive tra|
|00000eb0| 63 74 2c 20 74 68 65 20 | 66 6f 6f 64 20 6d 6f 76 |ct, the |food mov|
|00000ec0| 65 73 20 69 6e 74 6f 20 | 61 20 6c 61 72 67 65 20 |es into |a large |
|00000ed0| 73 74 6f 6d 61 63 68 20 | 6b 6e 6f 77 6e 20 61 73 |stomach |known as|
|00000ee0| 20 74 68 65 20 63 61 72 | 64 69 61 63 20 73 74 6f | the car|diac sto|
|00000ef0| 6d 61 63 68 20 77 68 65 | 72 65 20 69 74 20 69 73 |mach whe|re it is|
|00000f00| 20 62 72 6f 6b 65 6e 20 | 64 6f 77 6e 20 69 6e 74 | broken |down int|
|00000f10| 6f 20 73 6d 61 6c 6c 65 | 72 20 70 69 65 63 65 73 |o smalle|r pieces|
|00000f20| 2e 20 46 6f 6c 6c 6f 77 | 69 6e 67 20 74 68 65 20 |. Follow|ing the |
|00000f30| 63 61 72 64 69 61 63 20 | 73 74 6f 6d 61 63 68 2c |cardiac |stomach,|
|00000f40| 20 74 68 65 20 66 6f 6f | 64 20 65 6e 74 65 72 73 | the foo|d enters|
|00000f50| 20 61 20 73 65 63 6f 6e | 64 20 73 74 6f 6d 61 63 | a secon|d stomac|
|00000f60| 68 20 77 68 65 72 65 20 | 64 69 67 65 73 74 69 76 |h where |digestiv|
|00000f70| 65 20 6a 75 69 63 65 73 | 20 6b 6e 6f 77 6e 20 61 |e juices| known a|
|00000f80| 73 20 65 6e 7a 79 6d 65 | 73 20 62 72 65 61 6b 20 |s enzyme|s break |
|00000f90| 64 6f 77 6e 20 74 68 65 | 20 66 6f 6f 64 20 69 6e |down the| food in|
|00000fa0| 74 6f 20 65 76 65 6e 20 | 73 6d 61 6c 6c 65 72 20 |to even |smaller |
|00000fb0| 70 69 65 63 65 73 20 74 | 68 61 74 20 63 61 6e 20 |pieces t|hat can |
|00000fc0| 6e 6f 77 20 62 65 20 65 | 61 73 69 6c 79 20 61 62 |now be e|asily ab|
|00000fd0| 73 6f 72 62 65 64 20 62 | 79 20 74 68 65 20 6c 6f |sorbed b|y the lo|
|00000fe0| 62 73 74 65 72 27 73 20 | 62 6c 6f 6f 64 20 63 65 |bster's |blood ce|
|00000ff0| 6c 6c 73 2e 20 54 68 65 | 73 65 20 65 6e 7a 79 6d |lls. The|se enzym|
|00001000| 65 73 20 61 72 65 20 70 | 72 6f 64 75 63 65 64 20 |es are p|roduced |
|00001010| 62 79 20 61 20 6c 61 72 | 67 65 20 67 6c 61 6e 64 |by a lar|ge gland|
|00001020| 2c 20 6c 6f 63 61 74 65 | 64 20 6e 65 61 72 62 79 |, locate|d nearby|
|00001030| 2c 20 6b 6e 6f 77 6e 20 | 61 73 20 74 68 65 20 64 |, known |as the d|
|00001040| 69 67 65 73 74 69 76 65 | 20 67 6c 61 6e 64 2e 20 |igestive| gland. |
|00001050| 0a 67 05 4f 63 74 6f 70 | 75 73 20 42 72 61 69 6e |.g.Octop|us Brain|
|00001060| 0a 0a 4f 43 54 4f 50 55 | 53 20 42 52 41 49 4e 20 |..OCTOPU|S BRAIN |
|00001070| 0a 09 54 68 65 20 6f 63 | 74 6f 70 75 73 27 73 20 |..The oc|topus's |
|00001080| 62 72 61 69 6e 20 69 73 | 20 6f 6e 65 20 6f 66 20 |brain is| one of |
|00001090| 74 68 65 20 6c 61 72 67 | 65 73 74 2c 20 6d 6f 73 |the larg|est, mos|
|000010a0| 74 20 63 6f 6d 70 6c 65 | 78 20 62 72 61 69 6e 73 |t comple|x brains|
|000010b0| 20 6f 66 20 61 6c 6c 20 | 69 6e 76 65 72 74 65 62 | of all |inverteb|
|000010c0| 72 61 74 65 73 2e 20 49 | 74 20 69 73 20 65 6e 63 |rates. I|t is enc|
|000010d0| 6c 6f 73 65 64 20 69 6e | 20 61 20 74 68 69 63 6b |losed in| a thick|
|000010e0| 2c 20 70 72 6f 74 65 63 | 74 69 76 65 20 6c 61 79 |, protec|tive lay|
|000010f0| 65 72 20 6f 66 20 63 61 | 72 74 69 6c 61 67 65 20 |er of ca|rtilage |
|00001100| 6c 6f 63 61 74 65 64 20 | 6a 75 73 74 20 62 65 68 |located |just beh|
|00001110| 69 6e 64 20 74 68 65 20 | 6f 63 74 6f 70 75 73 27 |ind the |octopus'|
|00001120| 73 20 65 79 65 73 2e 20 | 0a 09 54 68 65 20 6f 63 |s eyes. |..The oc|
|00001130| 74 6f 70 75 73 27 73 20 | 62 72 61 69 6e 20 69 73 |topus's |brain is|
|00001140| 20 64 69 76 69 64 65 64 | 20 69 6e 74 6f 20 73 65 | divided| into se|
|00001150| 76 65 72 61 6c 20 61 72 | 65 61 73 20 6b 6e 6f 77 |veral ar|eas know|
|00001160| 6e 20 61 73 20 6c 6f 62 | 65 73 2e 20 45 61 63 68 |n as lob|es. Each|
|00001170| 20 6c 6f 62 65 20 69 73 | 20 63 6f 6e 6e 65 63 74 | lobe is| connect|
|00001180| 65 64 20 74 6f 20 70 61 | 72 74 73 20 6f 66 20 74 |ed to pa|rts of t|
|00001190| 68 65 20 6f 63 74 6f 70 | 75 73 27 73 20 62 6f 64 |he octop|us's bod|
|000011a0| 79 20 62 79 20 6c 6f 6e | 67 2c 20 74 68 69 63 6b |y by lon|g, thick|
|000011b0| 20 6e 65 72 76 65 20 66 | 69 62 65 72 73 2e 20 54 | nerve f|ibers. T|
|000011c0| 68 65 20 6c 6f 62 65 73 | 20 6f 66 20 61 6e 20 6f |he lobes| of an o|
|000011d0| 63 74 6f 70 75 73 27 73 | 20 62 72 61 69 6e 20 6d |ctopus's| brain m|
|000011e0| 6f 6e 69 74 6f 72 20 61 | 6e 64 20 63 6f 6e 74 72 |onitor a|nd contr|
|000011f0| 6f 6c 20 6d 69 6c 6c 69 | 6f 6e 73 20 6f 66 20 74 |ol milli|ons of t|
|00001200| 69 6e 79 20 65 6c 65 63 | 74 72 69 63 61 6c 20 69 |iny elec|trical i|
|00001210| 6d 70 75 6c 73 65 73 20 | 74 68 61 74 20 74 72 61 |mpulses |that tra|
|00001220| 76 65 6c 20 62 65 74 77 | 65 65 6e 20 74 68 65 20 |vel betw|een the |
|00001230| 62 72 61 69 6e 20 61 6e | 64 20 74 68 65 20 64 69 |brain an|d the di|
|00001240| 66 66 65 72 65 6e 74 20 | 70 61 72 74 73 20 6f 66 |fferent |parts of|
|00001250| 20 74 68 65 20 6f 63 74 | 6f 70 75 73 27 73 20 62 | the oct|opus's b|
|00001260| 6f 64 79 2e 20 54 68 65 | 73 65 20 69 6d 70 75 6c |ody. The|se impul|
|00001270| 73 65 73 20 74 65 6c 6c | 20 74 68 65 20 62 72 61 |ses tell| the bra|
|00001280| 69 6e 20 77 68 61 74 20 | 69 73 20 67 6f 69 6e 67 |in what |is going|
|00001290| 20 6f 6e 20 62 6f 74 68 | 20 69 6e 73 69 64 65 20 | on both| inside |
|000012a0| 61 6e 64 20 6f 75 74 73 | 69 64 65 20 74 68 65 20 |and outs|ide the |
|000012b0| 6f 63 74 6f 70 75 73 27 | 73 20 62 6f 64 79 2e 20 |octopus'|s body. |
|000012c0| 41 74 20 74 68 65 20 73 | 61 6d 65 20 74 69 6d 65 |At the s|ame time|
|000012d0| 2c 20 74 68 65 20 62 72 | 61 69 6e 20 69 73 20 73 |, the br|ain is s|
|000012e0| 65 6e 64 69 6e 67 20 6d | 65 73 73 61 67 65 73 20 |ending m|essages |
|000012f0| 74 6f 20 74 68 65 20 72 | 65 73 74 20 6f 66 20 74 |to the r|est of t|
|00001300| 68 65 20 62 6f 64 79 2c | 20 74 65 6c 6c 69 6e 67 |he body,| telling|
|00001310| 20 69 74 20 77 68 61 74 | 20 74 6f 20 64 6f 2e 20 | it what| to do. |
|00001320| 0a 09 4f 6e 65 20 6f 66 | 20 74 68 65 20 6c 61 72 |..One of| the lar|
|00001330| 67 65 73 74 20 6c 6f 62 | 65 73 20 69 6e 20 74 68 |gest lob|es in th|
|00001340| 65 20 6f 63 74 6f 70 75 | 73 27 73 20 62 72 61 69 |e octopu|s's brai|
|00001350| 6e 20 69 73 20 63 61 6c | 6c 65 64 20 74 68 65 20 |n is cal|led the |
|00001360| 76 69 73 75 61 6c 20 6c | 6f 62 65 2e 20 49 74 20 |visual l|obe. It |
|00001370| 69 73 20 63 6f 6e 6e 65 | 63 74 65 64 20 74 6f 20 |is conne|cted to |
|00001380| 74 68 65 20 65 79 65 73 | 20 61 6e 64 20 6b 65 65 |the eyes| and kee|
|00001390| 70 73 20 74 72 61 63 6b | 20 6f 66 20 61 6c 6c 20 |ps track| of all |
|000013a0| 74 68 65 20 76 69 73 75 | 61 6c 20 69 6e 66 6f 72 |the visu|al infor|
|000013b0| 6d 61 74 69 6f 6e 20 62 | 65 69 6e 67 20 74 72 61 |mation b|eing tra|
|000013c0| 6e 73 6d 69 74 74 65 64 | 20 74 6f 20 61 6e 64 20 |nsmitted| to and |
|000013d0| 66 72 6f 6d 20 74 68 65 | 20 6f 63 74 6f 70 75 73 |from the| octopus|
|000013e0| 27 73 20 65 79 65 73 2e | 20 41 6e 6f 74 68 65 72 |'s eyes.| Another|
|000013f0| 20 6c 61 72 67 65 20 6c | 6f 62 65 20 69 6e 20 74 | large l|obe in t|
|00001400| 68 65 20 62 72 61 69 6e | 20 69 73 20 72 65 73 70 |he brain| is resp|
|00001410| 6f 6e 73 69 62 6c 65 20 | 66 6f 72 20 74 68 65 20 |onsible |for the |
|00001420| 6d 65 73 73 61 67 65 73 | 20 63 6f 6d 69 6e 67 20 |messages| coming |
|00001430| 66 72 6f 6d 20 74 68 65 | 20 6f 63 74 6f 70 75 73 |from the| octopus|
|00001440| 27 73 20 61 72 6d 73 20 | 61 6e 64 20 73 75 63 74 |'s arms |and suct|
|00001450| 69 6f 6e 20 63 75 70 73 | 2e 20 4f 63 74 6f 70 75 |ion cups|. Octopu|
|00001460| 73 65 73 20 72 65 6c 79 | 20 68 65 61 76 69 6c 79 |ses rely| heavily|
|00001470| 20 6f 6e 20 74 68 65 69 | 72 20 61 62 69 6c 69 74 | on thei|r abilit|
|00001480| 79 20 74 6f 20 66 65 65 | 6c 20 61 6e 64 20 6d 61 |y to fee|l and ma|
|00001490| 6e 69 70 75 6c 61 74 65 | 20 6f 62 6a 65 63 74 73 |nipulate| objects|
|000014a0| 2c 20 73 6f 20 74 68 69 | 73 20 70 61 72 74 20 6f |, so thi|s part o|
|000014b0| 66 20 74 68 65 20 62 72 | 61 69 6e 20 69 73 20 76 |f the br|ain is v|
|000014c0| 65 72 79 20 6c 61 72 67 | 65 2e 20 55 6e 6c 69 6b |ery larg|e. Unlik|
|000014d0| 65 20 6d 6f 73 74 20 75 | 6e 64 65 72 73 65 61 20 |e most u|ndersea |
|000014e0| 61 6e 69 6d 61 6c 73 2c | 20 74 68 65 20 6f 63 74 |animals,| the oct|
|000014f0| 6f 70 75 73 27 73 20 62 | 72 61 69 6e 20 69 73 20 |opus's b|rain is |
|00001500| 63 61 70 61 62 6c 65 20 | 6f 66 20 72 65 6d 65 6d |capable |of remem|
|00001510| 62 65 72 69 6e 67 20 74 | 68 69 6e 67 73 2e 20 41 |bering t|hings. A|
|00001520| 6e 20 6f 63 74 6f 70 75 | 73 20 63 61 6e 20 61 63 |n octopu|s can ac|
|00001530| 74 75 61 6c 6c 79 20 6c | 65 61 72 6e 20 66 72 6f |tually l|earn fro|
|00001540| 6d 20 69 74 73 20 65 78 | 70 65 72 69 65 6e 63 65 |m its ex|perience|
|00001550| 73 2c 20 72 65 6d 65 6d | 62 65 72 69 6e 67 20 74 |s, remem|bering t|
|00001560| 6f 20 61 76 6f 69 64 20 | 70 6c 61 63 65 73 20 77 |o avoid |places w|
|00001570| 68 65 72 65 20 70 72 65 | 64 61 74 6f 72 73 20 6c |here pre|dators l|
|00001580| 69 76 65 20 6f 72 20 72 | 65 6d 65 6d 62 65 72 69 |ive or r|ememberi|
|00001590| 6e 67 20 74 6f 20 67 6f | 20 74 6f 20 70 6c 61 63 |ng to go| to plac|
|000015a0| 65 73 20 77 68 65 72 65 | 20 74 68 65 72 65 20 69 |es where| there i|
|000015b0| 73 20 61 6e 20 61 62 75 | 6e 64 61 6e 63 65 20 6f |s an abu|ndance o|
|000015c0| 66 20 66 6f 6f 64 2e 20 | 0a 4c 02 4f 63 74 6f 70 |f food. |.L.Octop|
|000015d0| 75 73 20 47 69 6c 6c 73 | 0a 0a 4f 43 54 4f 50 55 |us Gills|..OCTOPU|
|000015e0| 53 20 47 49 4c 4c 53 20 | 0a 09 54 68 65 20 67 69 |S GILLS |..The gi|
|000015f0| 6c 6c 73 20 6f 66 20 61 | 6e 20 6f 63 74 6f 70 75 |lls of a|n octopu|
|00001600| 73 20 61 72 65 20 6c 6f | 63 61 74 65 64 20 73 61 |s are lo|cated sa|
|00001610| 66 65 6c 79 20 69 6e 73 | 69 64 65 20 74 68 65 20 |fely ins|ide the |
|00001620| 6f 63 74 6f 70 75 73 27 | 73 20 62 6f 64 79 20 63 |octopus'|s body c|
|00001630| 61 76 69 74 79 2e 20 4c | 69 6b 65 20 61 20 66 69 |avity. L|ike a fi|
|00001640| 73 68 27 73 20 67 69 6c | 6c 2c 20 61 6e 20 6f 63 |sh's gil|l, an oc|
|00001650| 74 6f 70 75 73 27 73 20 | 67 69 6c 6c 20 69 73 20 |topus's |gill is |
|00001660| 6d 61 64 65 20 6f 66 20 | 61 20 66 65 61 74 68 65 |made of |a feathe|
|00001670| 72 79 20 6d 61 74 65 72 | 69 61 6c 20 74 68 61 74 |ry mater|ial that|
|00001680| 20 69 73 20 66 69 6c 6c | 65 64 20 77 69 74 68 20 | is fill|ed with |
|00001690| 74 69 6e 79 20 62 6c 6f | 6f 64 20 76 65 73 73 65 |tiny blo|od vesse|
|000016a0| 6c 73 2e 20 54 6f 20 63 | 61 70 74 75 72 65 20 6f |ls. To c|apture o|
|000016b0| 78 79 67 65 6e 20 66 72 | 6f 6d 20 6f 63 65 61 6e |xygen fr|om ocean|
|000016c0| 20 77 61 74 65 72 2c 20 | 74 68 65 20 6f 63 74 6f | water, |the octo|
|000016d0| 70 75 73 20 64 72 61 77 | 73 20 77 61 74 65 72 20 |pus draw|s water |
|000016e0| 69 6e 74 6f 20 69 74 73 | 20 62 6f 64 79 20 74 68 |into its| body th|
|000016f0| 72 6f 75 67 68 20 61 20 | 73 6d 61 6c 6c 20 6d 75 |rough a |small mu|
|00001700| 73 63 75 6c 61 72 20 6f | 70 65 6e 69 6e 67 20 63 |scular o|pening c|
|00001710| 61 6c 6c 65 64 20 61 20 | 66 75 6e 6e 65 6c 2e 20 |alled a |funnel. |
|00001720| 54 68 65 20 77 61 74 65 | 72 20 74 68 65 6e 20 70 |The wate|r then p|
|00001730| 61 73 73 65 73 20 6f 76 | 65 72 20 74 68 65 20 6f |asses ov|er the o|
|00001740| 63 74 6f 70 75 73 27 73 | 20 67 69 6c 6c 73 2c 20 |ctopus's| gills, |
|00001750| 77 68 65 72 65 20 6f 78 | 79 67 65 6e 20 69 73 20 |where ox|ygen is |
|00001760| 61 62 73 6f 72 62 65 64 | 20 62 79 20 74 68 65 20 |absorbed| by the |
|00001770| 6f 63 74 6f 70 75 73 27 | 73 20 62 6c 6f 6f 64 20 |octopus'|s blood |
|00001780| 63 65 6c 6c 73 20 61 6e | 64 20 63 61 72 62 6f 6e |cells an|d carbon|
|00001790| 20 64 69 6f 78 69 64 65 | 20 69 73 20 72 65 6c 65 | dioxide| is rele|
|000017a0| 61 73 65 64 2e 20 41 74 | 20 74 68 69 73 20 70 6f |ased. At| this po|
|000017b0| 69 6e 74 2c 20 74 68 65 | 20 74 69 6e 79 20 61 74 |int, the| tiny at|
|000017c0| 6f 6d 73 20 6f 66 20 6f | 78 79 67 65 6e 20 6c 61 |oms of o|xygen la|
|000017d0| 74 63 68 20 6f 6e 74 6f | 20 64 69 66 66 65 72 65 |tch onto| differe|
|000017e0| 6e 74 20 62 6c 6f 6f 64 | 20 63 65 6c 6c 73 20 61 |nt blood| cells a|
|000017f0| 6e 64 20 61 72 65 20 74 | 68 65 6e 20 74 72 61 6e |nd are t|hen tran|
|00001800| 73 70 6f 72 74 65 64 20 | 61 6c 6c 20 6f 76 65 72 |sported |all over|
|00001810| 20 74 68 65 20 6f 63 74 | 6f 70 75 73 27 73 20 62 | the oct|opus's b|
|00001820| 6f 64 79 2e 20 0a 8e 03 | 4f 63 74 6f 70 75 73 20 |ody. ...|Octopus |
|00001830| 48 65 61 72 74 0a 0a 4f | 43 54 4f 50 55 53 20 48 |Heart..O|CTOPUS H|
|00001840| 45 41 52 54 20 0a 09 54 | 68 65 20 66 75 6e 63 74 |EART ..T|he funct|
|00001850| 69 6f 6e 20 6f 66 20 61 | 6e 20 6f 63 74 6f 70 75 |ion of a|n octopu|
|00001860| 73 27 73 20 68 65 61 72 | 74 20 69 73 20 74 6f 20 |s's hear|t is to |
|00001870| 70 75 6d 70 20 6f 78 79 | 67 65 6e 2d 72 69 63 68 |pump oxy|gen-rich|
|00001880| 20 62 6c 6f 6f 64 20 66 | 72 6f 6d 20 74 68 65 20 | blood f|rom the |
|00001890| 67 69 6c 6c 73 20 74 6f | 20 74 68 65 20 72 65 73 |gills to| the res|
|000018a0| 74 20 6f 66 20 74 68 65 | 20 6f 63 74 6f 70 75 73 |t of the| octopus|
|000018b0| 27 73 20 62 6f 64 79 20 | 76 69 61 20 61 20 6e 65 |'s body |via a ne|
|000018c0| 74 77 6f 72 6b 20 6f 66 | 20 62 6c 6f 6f 64 20 76 |twork of| blood v|
|000018d0| 65 73 73 65 6c 73 20 6b | 6e 6f 77 6e 20 61 73 20 |essels k|nown as |
|000018e0| 61 20 63 69 72 63 75 6c | 61 74 6f 72 79 20 73 79 |a circul|atory sy|
|000018f0| 73 74 65 6d 2e 20 54 68 | 65 20 6f 63 74 6f 70 75 |stem. Th|e octopu|
|00001900| 73 27 73 20 68 65 61 72 | 74 20 69 73 20 64 69 76 |s's hear|t is div|
|00001910| 69 64 65 64 20 69 6e 74 | 6f 20 74 77 6f 20 63 68 |ided int|o two ch|
|00001920| 61 6d 62 65 72 73 3a 20 | 61 6e 20 61 74 72 69 75 |ambers: |an atriu|
|00001930| 6d 2c 20 77 68 69 63 68 | 20 63 6f 6c 6c 65 63 74 |m, which| collect|
|00001940| 73 20 62 6c 6f 6f 64 20 | 66 72 6f 6d 20 74 68 65 |s blood |from the|
|00001950| 20 62 6f 64 79 3b 20 61 | 6e 64 20 61 20 76 65 6e | body; a|nd a ven|
|00001960| 74 72 69 63 6c 65 2c 20 | 77 68 69 63 68 20 70 75 |tricle, |which pu|
|00001970| 6d 70 73 20 62 6c 6f 6f | 64 20 6f 75 74 20 74 6f |mps bloo|d out to|
|00001980| 20 74 68 65 20 62 6f 64 | 79 2e 20 4c 69 6b 65 20 | the bod|y. Like |
|00001990| 61 6c 6c 20 68 65 61 72 | 74 73 2c 20 74 68 65 20 |all hear|ts, the |
|000019a0| 6f 63 74 6f 70 75 73 27 | 73 20 68 65 61 72 74 20 |octopus'|s heart |
|000019b0| 70 75 6d 70 73 20 72 68 | 79 74 68 6d 69 63 61 6c |pumps rh|ythmical|
|000019c0| 6c 79 2c 20 65 69 74 68 | 65 72 20 63 6f 6e 74 72 |ly, eith|er contr|
|000019d0| 61 63 74 69 6e 67 20 74 | 6f 20 70 75 73 68 20 62 |acting t|o push b|
|000019e0| 6c 6f 6f 64 20 6f 75 74 | 20 6f 66 20 74 68 65 20 |lood out| of the |
|000019f0| 68 65 61 72 74 20 6f 72 | 20 72 65 6c 61 78 69 6e |heart or| relaxin|
|00001a00| 67 20 74 6f 20 6c 65 74 | 20 62 6c 6f 6f 64 20 66 |g to let| blood f|
|00001a10| 6c 6f 77 20 62 61 63 6b | 20 69 6e 74 6f 20 74 68 |low back| into th|
|00001a20| 65 20 68 65 61 72 74 2e | 20 54 68 65 20 6f 63 74 |e heart.| The oct|
|00001a30| 6f 70 75 73 27 73 20 63 | 69 72 63 75 6c 61 74 6f |opus's c|irculato|
|00001a40| 72 79 20 73 79 73 74 65 | 6d 20 69 73 20 73 69 6d |ry syste|m is sim|
|00001a50| 69 6c 61 72 20 74 6f 20 | 74 68 61 74 20 6f 66 20 |ilar to |that of |
|00001a60| 61 20 63 72 61 62 20 6f | 72 20 61 20 73 68 65 6c |a crab o|r a shel|
|00001a70| 6c 66 69 73 68 2e 20 42 | 6c 6f 6f 64 20 66 6c 6f |lfish. B|lood flo|
|00001a80| 77 73 20 66 72 6f 6d 20 | 74 68 65 20 62 6f 64 79 |ws from |the body|
|00001a90| 20 74 69 73 73 75 65 20 | 74 68 72 6f 75 67 68 20 | tissue |through |
|00001aa0| 76 65 73 73 65 6c 73 20 | 6b 6e 6f 77 6e 20 61 73 |vessels |known as|
|00001ab0| 20 76 65 69 6e 73 20 69 | 6e 74 6f 20 61 20 6c 61 | veins i|nto a la|
|00001ac0| 72 67 65 20 62 6f 64 79 | 20 63 61 76 69 74 79 20 |rge body| cavity |
|00001ad0| 63 61 6c 6c 65 64 20 61 | 20 68 65 6d 6f 63 6f 65 |called a| hemocoe|
|00001ae0| 6c 2e 20 54 68 65 20 62 | 6c 6f 6f 64 20 74 68 65 |l. The b|lood the|
|00001af0| 6e 20 70 61 73 73 65 73 | 20 74 68 72 6f 75 67 68 |n passes| through|
|00001b00| 20 74 68 65 20 67 69 6c | 6c 73 20 77 68 65 72 65 | the gil|ls where|
|00001b10| 20 69 74 20 61 62 73 6f | 72 62 73 20 6f 78 79 67 | it abso|rbs oxyg|
|00001b20| 65 6e 20 66 72 6f 6d 20 | 74 68 65 20 73 65 61 77 |en from |the seaw|
|00001b30| 61 74 65 72 2e 20 41 66 | 74 65 72 20 74 68 69 73 |ater. Af|ter this|
|00001b40| 20 73 74 61 67 65 2c 20 | 74 68 65 20 62 6c 6f 6f | stage, |the bloo|
|00001b50| 64 20 74 72 61 76 65 6c | 73 20 74 6f 20 74 68 65 |d travel|s to the|
|00001b60| 20 68 65 61 72 74 20 77 | 68 65 72 65 20 69 74 20 | heart w|here it |
|00001b70| 69 73 20 70 75 6d 70 65 | 64 20 62 61 63 6b 20 6f |is pumpe|d back o|
|00001b80| 75 74 20 74 6f 20 74 68 | 65 20 72 65 73 74 20 6f |ut to th|e rest o|
|00001b90| 66 20 74 68 65 20 62 6f | 64 79 20 74 68 72 6f 75 |f the bo|dy throu|
|00001ba0| 67 68 20 62 6c 6f 6f 64 | 20 76 65 73 73 65 6c 73 |gh blood| vessels|
|00001bb0| 20 6b 6e 6f 77 6e 20 61 | 73 20 61 72 74 65 72 69 | known a|s arteri|
|00001bc0| 65 73 2e 20 0a de 02 4f | 63 74 6f 70 75 73 20 4d |es. ...O|ctopus M|
|00001bd0| 6f 75 74 68 0a 0a 4f 43 | 54 4f 50 55 53 20 4d 4f |outh..OC|TOPUS MO|
|00001be0| 55 54 48 20 0a 09 4f 63 | 74 6f 70 75 73 65 73 20 |UTH ..Oc|topuses |
|00001bf0| 68 61 76 65 20 73 74 72 | 6f 6e 67 2c 20 62 65 61 |have str|ong, bea|
|00001c00| 6b 2d 6c 69 6b 65 20 6a | 61 77 73 20 74 68 61 74 |k-like j|aws that|
|00001c10| 20 61 72 65 20 73 6f 20 | 70 6f 77 65 72 66 75 6c | are so |powerful|
|00001c20| 20 74 68 65 79 20 63 61 | 6e 20 63 72 75 73 68 20 | they ca|n crush |
|00001c30| 74 68 65 20 73 68 65 6c | 6c 73 20 6f 66 20 76 65 |the shel|ls of ve|
|00001c40| 72 79 20 6c 61 72 67 65 | 20 63 72 61 62 73 20 61 |ry large| crabs a|
|00001c50| 6e 64 20 6c 6f 62 73 74 | 65 72 73 2e 20 57 68 65 |nd lobst|ers. Whe|
|00001c60| 6e 20 61 6e 20 6f 63 74 | 6f 70 75 73 20 63 61 70 |n an oct|opus cap|
|00001c70| 74 75 72 65 73 20 69 74 | 73 20 70 72 65 79 2c 20 |tures it|s prey, |
|00001c80| 69 74 20 68 6f 6c 64 73 | 20 74 68 65 20 61 6e 69 |it holds| the ani|
|00001c90| 6d 61 6c 20 69 6e 20 69 | 74 73 20 6d 6f 75 74 68 |mal in i|ts mouth|
|00001ca0| 2c 20 74 68 65 6e 20 6b | 69 6c 6c 73 20 6f 72 20 |, then k|ills or |
|00001cb0| 70 61 72 61 6c 79 7a 65 | 73 20 69 74 20 77 69 74 |paralyze|s it wit|
|00001cc0| 68 20 61 20 70 6f 69 73 | 6f 6e 20 74 68 61 74 20 |h a pois|on that |
|00001cd0| 69 73 20 73 65 63 72 65 | 74 65 64 20 62 79 20 74 |is secre|ted by t|
|00001ce0| 68 65 20 6f 63 74 6f 70 | 75 73 27 73 20 73 61 6c |he octop|us's sal|
|00001cf0| 69 76 61 72 79 20 67 6c | 61 6e 64 73 2e 20 54 68 |ivary gl|ands. Th|
|00001d00| 65 20 6f 63 74 6f 70 75 | 73 20 74 68 65 6e 20 69 |e octopu|s then i|
|00001d10| 6e 6a 65 63 74 73 20 69 | 6e 74 6f 20 69 74 73 20 |njects i|nto its |
|00001d20| 70 72 65 79 27 73 20 62 | 6f 64 79 20 61 20 64 69 |prey's b|ody a di|
|00001d30| 67 65 73 74 69 76 65 20 | 65 6e 7a 79 6d 65 20 74 |gestive |enzyme t|
|00001d40| 68 61 74 20 64 69 73 73 | 6f 6c 76 65 73 20 6d 61 |hat diss|olves ma|
|00001d50| 6e 79 20 6f 66 20 74 68 | 65 20 61 6e 69 6d 61 6c |ny of th|e animal|
|00001d60| 27 73 20 74 6f 75 67 68 | 65 73 74 20 62 6f 64 79 |'s tough|est body|
|00001d70| 20 74 69 73 73 75 65 73 | 2e 20 4f 6e 63 65 20 74 | tissues|. Once t|
|00001d80| 68 65 20 61 6e 69 6d 61 | 6c 27 73 20 62 6f 64 79 |he anima|l's body|
|00001d90| 20 69 73 20 73 6f 66 74 | 20 65 6e 6f 75 67 68 2c | is soft| enough,|
|00001da0| 20 74 68 65 20 6f 63 74 | 6f 70 75 73 20 73 75 63 | the oct|opus suc|
|00001db0| 6b 73 20 69 74 20 69 6e | 74 6f 20 69 74 73 20 6d |ks it in|to its m|
|00001dc0| 6f 75 74 68 2e 20 42 65 | 63 61 75 73 65 20 74 68 |outh. Be|cause th|
|00001dd0| 65 20 6f 63 74 6f 70 75 | 73 20 64 69 73 73 6f 6c |e octopu|s dissol|
|00001de0| 76 65 73 20 6d 6f 73 74 | 20 6f 66 20 69 74 73 20 |ves most| of its |
|00001df0| 66 6f 6f 64 20 6f 75 74 | 73 69 64 65 20 6f 66 20 |food out|side of |
|00001e00| 69 74 73 20 62 6f 64 79 | 2c 20 69 74 20 6f 6e 6c |its body|, it onl|
|00001e10| 79 20 6e 65 65 64 73 20 | 61 20 73 69 6d 70 6c 65 |y needs |a simple|
|00001e20| 20 64 69 67 65 73 74 69 | 76 65 20 73 79 73 74 65 | digesti|ve syste|
|00001e30| 6d 20 74 6f 20 61 62 73 | 6f 72 62 20 66 6f 6f 64 |m to abs|orb food|
|00001e40| 20 69 6e 74 6f 20 69 74 | 73 20 62 6c 6f 6f 64 73 | into it|s bloods|
|00001e50| 74 72 65 61 6d 2e 20 41 | 20 66 65 77 20 68 6f 75 |tream. A| few hou|
|00001e60| 72 73 20 61 66 74 65 72 | 20 61 6e 20 6f 63 74 6f |rs after| an octo|
|00001e70| 70 75 73 20 63 61 70 74 | 75 72 65 73 20 61 20 63 |pus capt|ures a c|
|00001e80| 72 61 62 20 6f 72 20 6c | 6f 62 73 74 65 72 2c 20 |rab or l|obster, |
|00001e90| 61 6c 6c 20 74 68 61 74 | 27 73 20 6c 65 66 74 20 |all that|'s left |
|00001ea0| 69 73 20 61 6e 20 65 6d | 70 74 79 20 73 68 65 6c |is an em|pty shel|
|00001eb0| 6c 2e 20 0a 2d 03 4f 63 | 74 6f 70 75 73 20 53 74 |l. .-.Oc|topus St|
|00001ec0| 6f 6d 61 63 68 0a 0a 4f | 43 54 4f 50 55 53 20 53 |omach..O|CTOPUS S|
|00001ed0| 54 4f 4d 41 43 48 20 0a | 09 55 6e 6c 69 6b 65 20 |TOMACH .|.Unlike |
|00001ee0| 6d 61 6e 79 20 61 6e 69 | 6d 61 6c 73 2c 20 74 68 |many ani|mals, th|
|00001ef0| 65 20 6f 63 74 6f 70 75 | 73 20 64 6f 65 73 20 6d |e octopu|s does m|
|00001f00| 6f 73 74 20 6f 66 20 69 | 74 73 20 64 69 67 65 73 |ost of i|ts diges|
|00001f10| 74 69 6e 67 20 6f 75 74 | 73 69 64 65 20 74 68 65 |ting out|side the|
|00001f20| 20 62 6f 64 79 2e 20 46 | 6f 72 20 74 68 69 73 20 | body. F|or this |
|00001f30| 72 65 61 73 6f 6e 2c 20 | 74 68 65 20 6f 63 74 6f |reason, |the octo|
|00001f40| 70 75 73 20 6f 6e 6c 79 | 20 68 61 73 20 61 20 73 |pus only| has a s|
|00001f50| 6d 61 6c 6c 2c 20 73 69 | 6d 70 6c 65 20 73 74 6f |mall, si|mple sto|
|00001f60| 6d 61 63 68 2e 20 0a 09 | 4d 61 6e 79 20 61 6e 69 |mach. ..|Many ani|
|00001f70| 6d 61 6c 73 20 6e 65 65 | 64 20 66 6f 6f 64 20 74 |mals nee|d food t|
|00001f80| 6f 20 62 65 20 69 6e 20 | 74 68 65 69 72 20 64 69 |o be in |their di|
|00001f90| 67 65 73 74 69 76 65 20 | 73 79 73 74 65 6d 20 66 |gestive |system f|
|00001fa0| 6f 72 20 73 65 76 65 72 | 61 6c 20 73 74 61 67 65 |or sever|al stage|
|00001fb0| 73 20 73 74 61 67 65 73 | 20 6f 66 20 64 69 67 65 |s stages| of dige|
|00001fc0| 73 74 69 6f 6e 2e 20 54 | 68 69 73 20 68 65 6c 70 |stion. T|his help|
|00001fd0| 73 20 62 72 65 61 6b 20 | 64 6f 77 6e 20 74 68 65 |s break |down the|
|00001fe0| 20 66 6f 6f 64 20 69 6e | 74 6f 20 70 69 65 63 65 | food in|to piece|
|00001ff0| 73 20 73 6d 61 6c 6c 20 | 65 6e 6f 75 67 68 20 74 |s small |enough t|
|00002000| 6f 20 62 65 20 61 62 73 | 6f 72 62 65 64 20 69 6e |o be abs|orbed in|
|00002010| 74 6f 20 74 68 65 69 72 | 20 62 6f 64 79 27 73 20 |to their| body's |
|00002020| 62 6c 6f 6f 64 73 74 72 | 65 61 6d 2e 20 54 68 65 |bloodstr|eam. The|
|00002030| 20 6f 63 74 6f 70 75 73 | 20 69 73 20 64 69 66 66 | octopus| is diff|
|00002040| 65 72 65 6e 74 2e 20 49 | 74 20 69 6e 6a 65 63 74 |erent. I|t inject|
|00002050| 73 20 64 69 67 65 73 74 | 69 76 65 20 65 6e 7a 79 |s digest|ive enzy|
|00002060| 6d 65 73 20 69 6e 74 6f | 20 69 74 73 20 66 6f 6f |mes into| its foo|
|00002070| 64 20 62 65 66 6f 72 65 | 20 74 68 65 20 66 6f 6f |d before| the foo|
|00002080| 64 20 65 76 65 6e 20 65 | 6e 74 65 72 73 20 69 74 |d even e|nters it|
|00002090| 73 20 6d 6f 75 74 68 2e | 20 54 68 65 73 65 20 65 |s mouth.| These e|
|000020a0| 6e 7a 79 6d 65 73 20 77 | 6f 72 6b 20 6c 69 6b 65 |nzymes w|ork like|
|000020b0| 20 61 63 69 64 73 2c 20 | 64 69 73 73 6f 6c 76 69 | acids, |dissolvi|
|000020c0| 6e 67 20 74 68 65 20 74 | 6f 75 67 68 20 70 61 72 |ng the t|ough par|
|000020d0| 74 73 20 6f 66 20 74 68 | 65 20 66 6f 6f 64 20 73 |ts of th|e food s|
|000020e0| 6f 20 74 68 61 74 20 69 | 74 20 63 61 6e 20 62 65 |o that i|t can be|
|000020f0| 20 71 75 69 63 6b 6c 79 | 20 61 6e 64 20 65 61 73 | quickly| and eas|
|00002100| 69 6c 79 20 64 69 67 65 | 73 74 65 64 20 62 79 20 |ily dige|sted by |
|00002110| 74 68 65 20 6f 63 74 6f | 70 75 73 27 73 20 73 74 |the octo|pus's st|
|00002120| 6f 6d 61 63 68 2e 20 4c | 6f 63 61 74 65 64 20 76 |omach. L|ocated v|
|00002130| 65 72 79 20 63 6c 6f 73 | 65 20 74 6f 20 74 68 65 |ery clos|e to the|
|00002140| 20 6f 63 74 6f 70 75 73 | 27 73 20 73 74 6f 6d 61 | octopus|'s stoma|
|00002150| 63 68 20 69 73 20 61 20 | 73 6d 61 6c 6c 20 69 6e |ch is a |small in|
|00002160| 6b 20 73 61 63 2e 20 57 | 68 65 6e 20 61 6e 20 6f |k sac. W|hen an o|
|00002170| 63 74 6f 70 75 73 20 69 | 73 20 69 6e 20 64 61 6e |ctopus i|s in dan|
|00002180| 67 65 72 2c 20 69 74 20 | 77 69 6c 6c 20 6f 66 74 |ger, it |will oft|
|00002190| 65 6e 20 73 71 75 69 72 | 74 20 69 6e 6b 20 6f 75 |en squir|t ink ou|
|000021a0| 74 20 6f 66 20 69 74 73 | 20 62 6f 64 79 2c 20 63 |t of its| body, c|
|000021b0| 72 65 61 74 69 6e 67 20 | 61 20 6d 75 72 6b 79 20 |reating |a murky |
|000021c0| 63 6c 6f 75 64 20 69 6e | 20 74 68 65 20 77 61 74 |cloud in| the wat|
|000021d0| 65 72 20 74 68 61 74 20 | 68 65 6c 70 73 20 63 6f |er that |helps co|
|000021e0| 6e 66 75 73 65 20 61 6e | 20 61 74 74 61 63 6b 65 |nfuse an| attacke|
|000021f0| 72 2e 20 0a 9c 06 53 68 | 61 72 6b 20 52 65 70 72 |r. ...Sh|ark Repr|
|00002200| 6f 64 75 63 74 69 6f 6e | 0a 0a 53 48 41 52 4b 20 |oduction|..SHARK |
|00002210| 52 45 50 52 4f 44 55 43 | 54 49 4f 4e 20 0a 09 4d |REPRODUC|TION ..M|
|00002220| 6f 73 74 20 73 68 61 72 | 6b 73 20 67 69 76 65 20 |ost shar|ks give |
|00002230| 62 69 72 74 68 20 74 6f | 20 6c 69 76 65 20 79 6f |birth to| live yo|
|00002240| 75 6e 67 20 72 61 74 68 | 65 72 20 74 68 61 6e 20 |ung rath|er than |
|00002250| 6c 61 79 20 65 67 67 73 | 2c 20 61 73 20 6d 6f 73 |lay eggs|, as mos|
|00002260| 74 20 66 69 73 68 20 64 | 6f 2e 20 0a 09 53 63 69 |t fish d|o. ..Sci|
|00002270| 65 6e 74 69 73 74 73 20 | 6b 6e 6f 77 20 76 65 72 |entists |know ver|
|00002280| 79 20 6c 69 74 74 6c 65 | 20 61 62 6f 75 74 20 74 |y little| about t|
|00002290| 68 65 20 6d 61 74 69 6e | 67 20 68 61 62 69 74 73 |he matin|g habits|
|000022a0| 20 6f 66 20 73 68 61 72 | 6b 73 2e 20 53 69 6e 63 | of shar|ks. Sinc|
|000022b0| 65 20 73 68 61 72 6b 73 | 20 72 61 6e 67 65 20 6f |e sharks| range o|
|000022c0| 76 65 72 20 73 75 63 68 | 20 77 69 64 65 20 61 72 |ver such| wide ar|
|000022d0| 65 61 73 20 6f 66 20 6f | 63 65 61 6e 2c 20 69 74 |eas of o|cean, it|
|000022e0| 20 6d 75 73 74 20 74 61 | 6b 65 20 61 20 6c 6f 6e | must ta|ke a lon|
|000022f0| 67 20 74 69 6d 65 20 66 | 6f 72 20 6d 61 6c 65 20 |g time f|or male |
|00002300| 61 6e 64 20 66 65 6d 61 | 6c 65 20 73 68 61 72 6b |and fema|le shark|
|00002310| 73 20 74 6f 20 66 69 6e | 64 20 6f 6e 65 20 61 6e |s to fin|d one an|
|00002320| 6f 74 68 65 72 2e 20 57 | 68 65 6e 20 74 68 65 79 |other. W|hen they|
|00002330| 20 64 6f 2c 20 74 68 65 | 20 6d 61 6c 65 20 63 68 | do, the| male ch|
|00002340| 61 73 65 73 20 74 68 65 | 20 66 65 6d 61 6c 65 2c |ases the| female,|
|00002350| 20 6f 66 74 65 6e 20 62 | 69 74 69 6e 67 20 68 65 | often b|iting he|
|00002360| 72 20 74 61 69 6c 20 74 | 6f 20 67 65 74 20 68 65 |r tail t|o get he|
|00002370| 72 20 69 6e 74 65 72 65 | 73 74 65 64 20 69 6e 20 |r intere|sted in |
|00002380| 6d 61 74 69 6e 67 2e 20 | 4f 6e 63 65 20 74 68 65 |mating. |Once the|
|00002390| 20 6d 61 6c 65 20 63 61 | 74 63 68 65 73 20 74 68 | male ca|tches th|
|000023a0| 65 20 66 65 6d 61 6c 65 | 2c 20 68 65 20 66 65 72 |e female|, he fer|
|000023b0| 74 69 6c 69 7a 65 73 20 | 68 65 72 20 65 67 67 73 |tilizes |her eggs|
|000023c0| 20 62 79 20 69 6e 73 65 | 72 74 69 6e 67 20 6f 6e | by inse|rting on|
|000023d0| 65 20 6f 66 20 68 69 73 | 20 66 69 6e 73 2c 20 6b |e of his| fins, k|
|000023e0| 6e 6f 77 6e 20 61 73 20 | 61 20 63 6c 61 73 70 65 |nown as |a claspe|
|000023f0| 72 2c 20 69 6e 74 6f 20 | 61 6e 20 6f 70 65 6e 69 |r, into |an openi|
|00002400| 6e 67 20 69 6e 20 74 68 | 65 20 66 65 6d 61 6c 65 |ng in th|e female|
|00002410| 27 73 20 62 6f 64 79 2e | 20 0a 09 49 6e 20 6d 6f |'s body.| ..In mo|
|00002420| 73 74 20 73 68 61 72 6b | 20 73 70 65 63 69 65 73 |st shark| species|
|00002430| 2c 20 74 68 65 20 66 65 | 72 74 69 6c 69 7a 65 64 |, the fe|rtilized|
|00002440| 20 65 67 67 73 20 72 65 | 73 69 64 65 20 69 6e 73 | eggs re|side ins|
|00002450| 69 64 65 20 61 20 63 61 | 76 69 74 79 20 69 6e 20 |ide a ca|vity in |
|00002460| 74 68 65 20 66 65 6d 61 | 6c 65 27 73 20 62 6f 64 |the fema|le's bod|
|00002470| 79 20 6b 6e 6f 77 6e 20 | 61 73 20 61 6e 20 6f 76 |y known |as an ov|
|00002480| 69 64 75 63 74 2e 20 53 | 61 66 65 20 69 6e 73 69 |iduct. S|afe insi|
|00002490| 64 65 20 74 68 65 20 6f | 76 69 64 75 63 74 2c 20 |de the o|viduct, |
|000024a0| 74 68 65 20 73 68 61 72 | 6b 20 65 6d 62 72 79 6f |the shar|k embryo|
|000024b0| 20 69 73 20 6e 6f 75 72 | 69 73 68 65 64 20 62 79 | is nour|ished by|
|000024c0| 20 61 20 79 6f 6c 6b 20 | 73 61 63 20 61 74 74 61 | a yolk |sac atta|
|000024d0| 63 68 65 64 20 74 6f 20 | 69 74 73 20 62 6f 64 79 |ched to |its body|
|000024e0| 2e 20 53 6f 6d 65 20 73 | 68 61 72 6b 20 65 6d 62 |. Some s|hark emb|
|000024f0| 72 79 6f 73 20 61 63 74 | 75 61 6c 6c 79 20 66 65 |ryos act|ually fe|
|00002500| 65 64 20 6f 6e 20 75 6e | 66 65 72 74 69 6c 69 7a |ed on un|fertiliz|
|00002510| 65 64 20 65 67 67 73 20 | 69 6e 73 69 64 65 20 74 |ed eggs |inside t|
|00002520| 68 65 20 66 65 6d 61 6c | 65 27 73 20 62 6f 64 79 |he femal|e's body|
|00002530| 2e 20 41 66 74 65 72 20 | 61 20 70 65 72 69 6f 64 |. After |a period|
|00002540| 20 6f 66 20 66 6f 75 72 | 20 74 6f 20 65 69 67 68 | of four| to eigh|
|00002550| 74 20 6d 6f 6e 74 68 73 | 2c 20 74 68 65 20 65 6d |t months|, the em|
|00002560| 62 72 79 6f 73 20 68 61 | 74 63 68 20 62 75 74 20 |bryos ha|tch but |
|00002570| 63 6f 6e 74 69 6e 75 65 | 20 74 6f 20 72 65 6d 61 |continue| to rema|
|00002580| 69 6e 20 69 6e 73 69 64 | 65 20 74 68 65 20 6f 76 |in insid|e the ov|
|00002590| 69 64 75 63 74 20 77 68 | 69 6c 65 20 74 68 65 20 |iduct wh|ile the |
|000025a0| 62 61 62 79 20 73 68 61 | 72 6b 20 6b 65 65 70 73 |baby sha|rk keeps|
|000025b0| 20 67 72 6f 77 69 6e 67 | 2e 20 45 76 65 6e 74 75 | growing|. Eventu|
|000025c0| 61 6c 6c 79 2c 20 74 68 | 65 20 66 65 6d 61 6c 65 |ally, th|e female|
|000025d0| 20 73 68 61 72 6b 20 67 | 69 76 65 73 20 62 69 72 | shark g|ives bir|
|000025e0| 74 68 20 74 6f 20 6c 69 | 76 65 20 62 61 62 79 20 |th to li|ve baby |
|000025f0| 73 68 61 72 6b 73 2e 20 | 55 6e 6c 69 6b 65 20 6d |sharks. |Unlike m|
|00002600| 61 6d 6d 61 6c 73 2c 20 | 73 68 61 72 6b 73 20 64 |ammals, |sharks d|
|00002610| 6f 20 6e 6f 74 20 63 61 | 72 65 20 66 6f 72 20 74 |o not ca|re for t|
|00002620| 68 65 69 72 20 79 6f 75 | 6e 67 2e 20 4f 6e 63 65 |heir you|ng. Once|
|00002630| 20 74 68 65 79 20 61 72 | 65 20 62 6f 72 6e 2c 20 | they ar|e born, |
|00002640| 62 61 62 79 20 73 68 61 | 72 6b 73 20 73 77 69 6d |baby sha|rks swim|
|00002650| 20 61 77 61 79 20 74 6f | 20 66 65 6e 64 20 66 6f | away to| fend fo|
|00002660| 72 20 74 68 65 6d 73 65 | 6c 76 65 73 2e 20 0a 09 |r themse|lves. ..|
|00002670| 41 20 73 6d 61 6c 6c 20 | 6e 75 6d 62 65 72 20 6f |A small |number o|
|00002680| 66 20 73 68 61 72 6b 73 | 20 6c 69 6b 65 20 74 68 |f sharks| like th|
|00002690| 65 20 64 6f 67 66 69 73 | 68 20 6f 72 20 73 77 65 |e dogfis|h or swe|
|000026a0| 6c 6c 20 73 68 61 72 6b | 20 72 65 70 72 6f 64 75 |ll shark| reprodu|
|000026b0| 63 65 20 62 79 20 6c 61 | 79 69 6e 67 20 65 67 67 |ce by la|ying egg|
|000026c0| 73 2e 20 4a 75 73 74 20 | 61 66 74 65 72 20 74 68 |s. Just |after th|
|000026d0| 65 20 66 65 6d 61 6c 65 | 27 73 20 65 67 67 73 20 |e female|'s eggs |
|000026e0| 61 72 65 20 66 65 72 74 | 69 6c 69 7a 65 64 2c 20 |are fert|ilized, |
|000026f0| 74 68 65 79 20 61 72 65 | 20 63 6f 76 65 72 65 64 |they are| covered|
|00002700| 20 77 69 74 68 20 61 20 | 6c 65 61 74 68 65 72 79 | with a |leathery|
|00002710| 20 73 68 65 6c 6c 20 77 | 68 69 63 68 20 72 65 73 | shell w|hich res|
|00002720| 65 6d 62 6c 65 73 20 61 | 20 73 6d 61 6c 6c 20 70 |embles a| small p|
|00002730| 75 72 73 65 2e 20 54 68 | 65 20 65 67 67 20 69 73 |urse. Th|e egg is|
|00002740| 20 74 68 65 6e 20 64 65 | 70 6f 73 69 74 65 64 20 | then de|posited |
|00002750| 69 6e 20 61 20 73 61 66 | 65 20 73 70 6f 74 20 6f |in a saf|e spot o|
|00002760| 6e 20 74 68 65 20 73 65 | 61 20 66 6c 6f 6f 72 2c |n the se|a floor,|
|00002770| 20 77 68 65 72 65 20 69 | 74 20 77 69 6c 6c 20 72 | where i|t will r|
|00002780| 65 6d 61 69 6e 20 66 6f | 72 20 61 73 20 6c 6f 6e |emain fo|r as lon|
|00002790| 67 20 61 73 20 61 20 79 | 65 61 72 2e 20 53 61 66 |g as a y|ear. Saf|
|000027a0| 65 20 69 6e 73 69 64 65 | 20 74 68 65 20 73 68 65 |e inside| the she|
|000027b0| 6c 6c 2c 20 74 68 65 20 | 73 68 61 72 6b 20 65 6d |ll, the |shark em|
|000027c0| 62 72 79 6f 20 6c 69 76 | 65 73 20 6f 66 66 20 6f |bryo liv|es off o|
|000027d0| 66 20 61 20 79 6f 6c 6b | 20 73 61 63 20 74 68 61 |f a yolk| sac tha|
|000027e0| 74 20 69 73 20 63 6f 6e | 6e 65 63 74 65 64 20 74 |t is con|nected t|
|000027f0| 6f 20 69 74 73 20 62 6f | 64 79 20 62 79 20 61 6e |o its bo|dy by an|
|00002800| 20 75 6d 62 69 6c 69 63 | 61 6c 20 63 6f 72 64 2e | umbilic|al cord.|
|00002810| 20 57 68 65 6e 20 74 68 | 65 20 73 68 61 72 6b 20 | When th|e shark |
|00002820| 66 69 6e 61 6c 6c 79 20 | 68 61 74 63 68 65 73 20 |finally |hatches |
|00002830| 66 72 6f 6d 20 69 74 73 | 20 65 67 67 2c 20 69 74 |from its| egg, it|
|00002840| 20 69 73 20 71 75 69 74 | 65 20 76 75 6c 6e 65 72 | is quit|e vulner|
|00002850| 61 62 6c 65 20 74 6f 20 | 61 74 74 61 63 6b 20 62 |able to |attack b|
|00002860| 79 20 70 72 65 64 61 74 | 6f 72 73 20 61 6e 64 20 |y predat|ors and |
|00002870| 6d 75 73 74 20 71 75 69 | 63 6b 6c 79 20 66 69 6e |must qui|ckly fin|
|00002880| 64 20 61 20 68 69 64 69 | 6e 67 20 70 6c 61 63 65 |d a hidi|ng place|
|00002890| 20 75 6e 74 69 6c 20 69 | 74 20 69 73 20 6c 61 72 | until i|t is lar|
|000028a0| 67 65 72 2e 20 0a 6b 05 | 53 68 61 72 6b 20 42 72 |ger. .k.|Shark Br|
|000028b0| 61 69 6e 0a 0a 53 48 41 | 52 4b 20 42 52 41 49 4e |ain..SHA|RK BRAIN|
|000028c0| 20 0a 09 46 6f 72 20 6d | 61 6e 79 20 79 65 61 72 | ..For m|any year|
|000028d0| 73 20 69 74 20 77 61 73 | 20 74 68 6f 75 67 68 74 |s it was| thought|
|000028e0| 20 74 68 61 74 20 73 68 | 61 72 6b 73 20 68 61 64 | that sh|arks had|
|000028f0| 20 73 69 6d 70 6c 65 2c | 20 70 72 69 6d 69 74 69 | simple,| primiti|
|00002900| 76 65 20 62 72 61 69 6e | 73 2e 20 59 65 74 20 72 |ve brain|s. Yet r|
|00002910| 65 63 65 6e 74 6c 79 2c | 20 73 63 69 65 6e 74 69 |ecently,| scienti|
|00002920| 73 74 73 20 68 61 76 65 | 20 73 68 6f 77 6e 20 74 |sts have| shown t|
|00002930| 68 61 74 20 6d 61 6e 79 | 20 73 68 61 72 6b 73 20 |hat many| sharks |
|00002940| 68 61 76 65 20 6c 61 72 | 67 65 2c 20 63 61 70 61 |have lar|ge, capa|
|00002950| 62 6c 65 20 62 72 61 69 | 6e 73 2c 20 65 73 70 65 |ble brai|ns, espe|
|00002960| 63 69 61 6c 6c 79 20 77 | 68 65 6e 20 63 6f 6d 70 |cially w|hen comp|
|00002970| 61 72 65 64 20 74 6f 20 | 6f 74 68 65 72 20 76 65 |ared to |other ve|
|00002980| 72 74 65 62 72 61 74 65 | 73 2e 20 43 65 72 74 61 |rtebrate|s. Certa|
|00002990| 69 6e 20 73 68 61 72 6b | 73 20 68 61 76 65 20 65 |in shark|s have e|
|000029a0| 76 65 6e 20 64 65 6d 6f | 6e 73 74 72 61 74 65 64 |ven demo|nstrated|
|000029b0| 20 74 68 65 20 61 62 69 | 6c 69 74 79 20 74 6f 20 | the abi|lity to |
|000029c0| 6c 65 61 72 6e 20 73 69 | 6d 70 6c 65 20 74 61 73 |learn si|mple tas|
|000029d0| 6b 73 2e 20 0a 09 41 20 | 73 68 61 72 6b 27 73 20 |ks. ..A |shark's |
|000029e0| 62 72 61 69 6e 20 69 73 | 20 74 68 65 20 63 65 6e |brain is| the cen|
|000029f0| 74 65 72 20 6f 66 20 61 | 20 63 6f 6d 70 6c 65 78 |ter of a| complex|
|00002a00| 20 73 79 73 74 65 6d 20 | 6f 66 20 6e 65 72 76 65 | system |of nerve|
|00002a10| 73 20 61 6e 64 20 73 65 | 6e 73 65 73 2e 20 4d 69 |s and se|nses. Mi|
|00002a20| 6c 6c 69 6f 6e 73 20 6f | 66 20 74 69 6e 79 20 65 |llions o|f tiny e|
|00002a30| 6c 65 63 74 72 69 63 61 | 6c 20 6d 65 73 73 61 67 |lectrica|l messag|
|00002a40| 65 73 20 61 72 65 20 74 | 72 61 6e 73 6d 69 74 74 |es are t|ransmitt|
|00002a50| 65 64 20 74 6f 20 74 68 | 65 20 62 72 61 69 6e 20 |ed to th|e brain |
|00002a60| 66 72 6f 6d 20 61 6c 6c | 20 6f 76 65 72 20 74 68 |from all| over th|
|00002a70| 65 20 73 68 61 72 6b 27 | 73 20 62 6f 64 79 2e 20 |e shark'|s body. |
|00002a80| 46 6f 72 20 69 6e 73 74 | 61 6e 63 65 2c 20 74 68 |For inst|ance, th|
|00002a90| 65 20 73 68 61 72 6b 27 | 73 20 65 79 65 73 20 61 |e shark'|s eyes a|
|00002aa0| 72 65 20 63 6f 6e 73 74 | 61 6e 74 6c 79 20 73 65 |re const|antly se|
|00002ab0| 6e 64 69 6e 67 20 69 6e | 66 6f 72 6d 61 74 69 6f |nding in|formatio|
|00002ac0| 6e 20 74 6f 20 74 68 65 | 20 62 72 61 69 6e 20 61 |n to the| brain a|
|00002ad0| 62 6f 75 74 20 77 68 61 | 74 20 69 73 20 76 69 73 |bout wha|t is vis|
|00002ae0| 69 62 6c 65 20 74 6f 20 | 74 68 65 20 73 68 61 72 |ible to |the shar|
|00002af0| 6b 2e 20 45 6c 65 63 74 | 72 69 63 61 6c 20 73 65 |k. Elect|rical se|
|00002b00| 6e 73 6f 72 73 20 69 6e | 20 74 68 65 20 73 68 61 |nsors in| the sha|
|00002b10| 72 6b 27 73 20 66 61 63 | 65 20 74 72 61 6e 73 6d |rk's fac|e transm|
|00002b20| 69 74 20 69 6e 66 6f 72 | 6d 61 74 69 6f 6e 20 61 |it infor|mation a|
|00002b30| 62 6f 75 74 20 74 68 65 | 20 65 6c 65 63 74 72 69 |bout the| electri|
|00002b40| 63 61 6c 20 66 69 65 6c | 64 73 20 62 65 69 6e 67 |cal fiel|ds being|
|00002b50| 20 63 72 65 61 74 65 64 | 20 62 79 20 6f 74 68 65 | created| by othe|
|00002b60| 72 20 61 6e 69 6d 61 6c | 73 20 69 6e 20 74 68 65 |r animal|s in the|
|00002b70| 20 77 61 74 65 72 2e 20 | 41 74 20 74 68 65 20 73 | water. |At the s|
|00002b80| 61 6d 65 20 74 69 6d 65 | 20 74 68 69 73 20 69 73 |ame time| this is|
|00002b90| 20 68 61 70 70 65 6e 69 | 6e 67 2c 20 74 68 65 20 | happeni|ng, the |
|00002ba0| 73 68 61 72 6b 27 73 20 | 62 72 61 69 6e 20 69 73 |shark's |brain is|
|00002bb0| 20 73 65 6e 64 69 6e 67 | 20 6d 65 73 73 61 67 65 | sending| message|
|00002bc0| 73 20 6f 75 74 20 74 6f | 20 74 68 65 20 64 69 66 |s out to| the dif|
|00002bd0| 66 65 72 65 6e 74 20 70 | 61 72 74 73 20 6f 66 20 |ferent p|arts of |
|00002be0| 74 68 65 20 62 6f 64 79 | 2c 20 69 6e 73 74 72 75 |the body|, instru|
|00002bf0| 63 74 69 6e 67 20 74 68 | 65 6d 20 77 68 61 74 20 |cting th|em what |
|00002c00| 74 6f 20 64 6f 2e 20 0a | 09 42 72 61 69 6e 73 20 |to do. .|.Brains |
|00002c10| 64 69 66 66 65 72 20 67 | 72 65 61 74 6c 79 20 69 |differ g|reatly i|
|00002c20| 6e 20 73 69 7a 65 20 61 | 6e 64 20 63 6f 6d 70 6c |n size a|nd compl|
|00002c30| 65 78 69 74 79 20 66 72 | 6f 6d 20 6f 6e 65 20 73 |exity fr|om one s|
|00002c40| 68 61 72 6b 20 73 70 65 | 63 69 65 73 20 74 6f 20 |hark spe|cies to |
|00002c50| 74 68 65 20 6e 65 78 74 | 2e 20 4c 61 72 67 65 2c |the next|. Large,|
|00002c60| 20 66 61 73 74 2d 6d 6f | 76 69 6e 67 20 73 68 61 | fast-mo|ving sha|
|00002c70| 72 6b 73 20 6c 69 6b 65 | 20 74 68 65 20 68 61 6d |rks like| the ham|
|00002c80| 6d 65 72 68 65 61 64 20 | 61 6e 64 20 64 75 73 6b |merhead |and dusk|
|00002c90| 79 20 73 68 61 72 6b 20 | 68 61 76 65 20 62 69 67 |y shark |have big|
|00002ca0| 67 65 72 20 62 72 61 69 | 6e 73 2c 20 70 72 6f 62 |ger brai|ns, prob|
|00002cb0| 61 62 6c 79 20 62 65 63 | 61 75 73 65 20 74 68 65 |ably bec|ause the|
|00002cc0| 79 20 73 70 65 6e 64 20 | 6d 6f 72 65 20 74 69 6d |y spend |more tim|
|00002cd0| 65 20 68 75 6e 74 69 6e | 67 20 61 6e 64 20 74 72 |e huntin|g and tr|
|00002ce0| 61 63 6b 69 6e 67 20 70 | 72 65 79 2e 20 53 6c 6f |acking p|rey. Slo|
|00002cf0| 77 65 72 2c 20 62 6f 74 | 74 6f 6d 2d 64 77 65 6c |wer, bot|tom-dwel|
|00002d00| 6c 69 6e 67 20 73 68 61 | 72 6b 73 2c 20 77 68 69 |ling sha|rks, whi|
|00002d10| 63 68 20 66 69 6e 64 20 | 6d 6f 73 74 20 6f 66 20 |ch find |most of |
|00002d20| 74 68 65 69 72 20 66 6f | 6f 64 20 69 6e 20 6f 6e |their fo|od in on|
|00002d30| 65 20 70 6c 61 63 65 2c | 20 67 65 6e 65 72 61 6c |e place,| general|
|00002d40| 6c 79 20 68 61 76 65 20 | 73 6d 61 6c 6c 65 72 20 |ly have |smaller |
|00002d50| 62 72 61 69 6e 73 2e 20 | 0a 09 53 68 61 72 6b 20 |brains. |..Shark |
|00002d60| 62 72 61 69 6e 73 20 61 | 72 65 20 64 69 76 69 64 |brains a|re divid|
|00002d70| 65 64 20 69 6e 74 6f 20 | 74 68 72 65 65 20 6c 61 |ed into |three la|
|00002d80| 72 67 65 20 73 65 67 6d | 65 6e 74 73 3a 20 61 20 |rge segm|ents: a |
|00002d90| 66 6f 72 65 62 72 61 69 | 6e 2c 20 61 20 6d 69 64 |forebrai|n, a mid|
|00002da0| 62 72 61 69 6e 20 61 6e | 64 20 61 20 68 69 6e 64 |brain an|d a hind|
|00002db0| 62 72 61 69 6e 2e 20 45 | 61 63 68 20 6f 66 20 74 |brain. E|ach of t|
|00002dc0| 68 65 73 65 20 73 65 67 | 6d 65 6e 74 73 20 69 73 |hese seg|ments is|
|00002dd0| 20 72 65 73 70 6f 6e 73 | 69 62 6c 65 20 66 6f 72 | respons|ible for|
|00002de0| 20 63 6f 6e 74 72 6f 6c | 6c 69 6e 67 20 61 20 64 | control|ling a d|
|00002df0| 69 66 66 65 72 65 6e 74 | 20 70 61 72 74 20 6f 66 |ifferent| part of|
|00002e00| 20 74 68 65 20 73 68 61 | 72 6b 27 73 20 62 6f 64 | the sha|rk's bod|
|00002e10| 69 6c 79 20 66 75 6e 63 | 74 69 6f 6e 73 2e 20 0a |ily func|tions. .|
|00002e20| dc 02 53 68 61 72 6b 20 | 48 65 61 72 74 0a 0a 53 |..Shark |Heart..S|
|00002e30| 48 41 52 4b 20 48 45 41 | 52 54 20 0a 09 4c 69 6b |HARK HEA|RT ..Lik|
|00002e40| 65 20 6f 74 68 65 72 20 | 66 69 73 68 20 68 65 61 |e other |fish hea|
|00002e50| 72 74 73 2c 20 74 68 65 | 20 73 68 61 72 6b 20 68 |rts, the| shark h|
|00002e60| 65 61 72 74 20 69 73 20 | 6d 61 64 65 20 6f 66 20 |eart is |made of |
|00002e70| 66 6f 75 72 20 63 68 61 | 6d 62 65 72 73 20 63 6f |four cha|mbers co|
|00002e80| 6d 70 6f 73 65 64 20 6f | 66 20 61 20 70 6f 77 65 |mposed o|f a powe|
|00002e90| 72 66 75 6c 20 6d 75 73 | 63 75 6c 61 72 20 74 69 |rful mus|cular ti|
|00002ea0| 73 73 75 65 2e 20 54 68 | 65 20 63 68 61 6d 62 65 |ssue. Th|e chambe|
|00002eb0| 72 73 20 77 6f 72 6b 20 | 74 6f 67 65 74 68 65 72 |rs work |together|
|00002ec0| 20 74 6f 20 63 6f 6c 6c | 65 63 74 20 62 6c 6f 6f | to coll|ect bloo|
|00002ed0| 64 20 66 72 6f 6d 20 74 | 68 65 20 73 68 61 72 6b |d from t|he shark|
|00002ee0| 27 73 20 62 6f 64 79 2c | 20 74 68 65 6e 20 70 75 |'s body,| then pu|
|00002ef0| 6d 70 20 69 74 20 74 6f | 20 74 68 65 20 67 69 6c |mp it to| the gil|
|00002f00| 6c 73 20 77 68 65 72 65 | 20 69 74 20 69 73 20 65 |ls where| it is e|
|00002f10| 6e 72 69 63 68 65 64 20 | 77 69 74 68 20 6f 78 79 |nriched |with oxy|
|00002f20| 67 65 6e 2e 20 0a 09 4f | 6e 63 65 20 74 68 65 20 |gen. ..O|nce the |
|00002f30| 62 6c 6f 6f 64 20 68 61 | 73 20 70 61 73 73 65 64 |blood ha|s passed|
|00002f40| 20 74 68 72 6f 75 67 68 | 20 74 68 65 20 67 69 6c | through| the gil|
|00002f50| 6c 73 2c 20 69 74 20 69 | 73 20 70 75 6d 70 65 64 |ls, it i|s pumped|
|00002f60| 20 62 61 63 6b 20 6f 75 | 74 20 74 6f 20 74 68 65 | back ou|t to the|
|00002f70| 20 73 68 61 72 6b 27 73 | 20 62 6f 64 79 2e 20 42 | shark's| body. B|
|00002f80| 6c 6f 6f 64 20 76 65 73 | 73 65 6c 73 20 6b 6e 6f |lood ves|sels kno|
|00002f90| 77 6e 20 61 73 20 76 65 | 69 6e 73 20 74 72 61 6e |wn as ve|ins tran|
|00002fa0| 73 70 6f 72 74 20 74 68 | 65 20 62 6c 6f 6f 64 20 |sport th|e blood |
|00002fb0| 66 72 6f 6d 20 74 68 65 | 20 73 68 61 72 6b 27 73 |from the| shark's|
|00002fc0| 20 62 6f 64 79 20 74 6f | 20 74 68 65 20 68 65 61 | body to| the hea|
|00002fd0| 72 74 2e 20 56 65 73 73 | 65 6c 73 20 6b 6e 6f 77 |rt. Vess|els know|
|00002fe0| 6e 20 61 73 20 61 72 74 | 65 72 69 65 73 20 63 61 |n as art|eries ca|
|00002ff0| 72 72 79 20 74 68 65 20 | 62 6c 6f 6f 64 20 6f 75 |rry the |blood ou|
|00003000| 74 20 6f 66 20 74 68 65 | 20 68 65 61 72 74 20 74 |t of the| heart t|
|00003010| 6f 20 74 68 65 20 67 69 | 6c 6c 73 2c 20 74 68 65 |o the gi|lls, the|
|00003020| 6e 20 62 61 63 6b 20 74 | 6f 20 74 68 65 20 64 69 |n back t|o the di|
|00003030| 66 66 65 72 65 6e 74 20 | 70 61 72 74 73 20 6f 66 |fferent |parts of|
|00003040| 20 74 68 65 20 73 68 61 | 72 6b 2e 20 54 68 65 20 | the sha|rk. The |
|00003050| 73 69 7a 65 20 6f 66 20 | 74 68 65 20 68 65 61 72 |size of |the hear|
|00003060| 74 20 64 65 70 65 6e 64 | 73 20 6f 6e 20 74 68 65 |t depend|s on the|
|00003070| 20 6b 69 6e 64 20 6f 66 | 20 73 68 61 72 6b 20 69 | kind of| shark i|
|00003080| 74 20 62 65 6c 6f 6e 67 | 73 20 74 6f 2e 20 48 69 |t belong|s to. Hi|
|00003090| 67 68 6c 79 20 61 63 74 | 69 76 65 20 73 68 61 72 |ghly act|ive shar|
|000030a0| 6b 73 20 73 75 63 68 20 | 61 73 20 74 68 65 20 6d |ks such |as the m|
|000030b0| 61 6b 6f 20 6f 72 20 67 | 72 65 79 20 73 68 61 72 |ako or g|rey shar|
|000030c0| 6b 20 68 61 76 65 20 6c | 61 72 67 65 72 20 68 65 |k have l|arger he|
|000030d0| 61 72 74 73 20 74 68 61 | 6e 20 64 6f 20 73 6c 6f |arts tha|n do slo|
|000030e0| 77 65 72 20 73 68 61 72 | 6b 73 2c 20 77 68 69 63 |wer shar|ks, whic|
|000030f0| 68 20 72 65 6d 61 69 6e | 20 69 6e 20 61 20 73 6d |h remain| in a sm|
|00003100| 61 6c 6c 20 61 72 65 61 | 2e 20 0a f0 04 53 68 61 |all area|. ...Sha|
|00003110| 72 6b 20 53 74 6f 6d 61 | 63 68 0a 0a 53 48 41 52 |rk Stoma|ch..SHAR|
|00003120| 4b 20 53 54 4f 4d 41 43 | 48 20 0a 09 41 6c 6c 20 |K STOMAC|H ..All |
|00003130| 73 68 61 72 6b 73 20 61 | 72 65 20 62 69 67 20 65 |sharks a|re big e|
|00003140| 61 74 65 72 73 2e 20 41 | 6e 64 20 62 65 63 61 75 |aters. A|nd becau|
|00003150| 73 65 20 74 68 65 79 20 | 61 72 65 20 62 69 67 20 |se they |are big |
|00003160| 65 61 74 65 72 73 2c 20 | 74 68 65 79 20 6e 65 65 |eaters, |they nee|
|00003170| 64 20 61 20 6c 61 72 67 | 65 20 73 74 6f 6d 61 63 |d a larg|e stomac|
|00003180| 68 20 74 6f 20 68 6f 6c | 64 20 74 68 65 69 72 20 |h to hol|d their |
|00003190| 66 6f 6f 64 2e 20 53 6f | 6d 65 20 73 68 61 72 6b |food. So|me shark|
|000031a0| 73 20 6b 65 65 70 20 6d | 6f 72 65 20 74 68 61 6e |s keep m|ore than|
|000031b0| 20 6a 75 73 74 20 66 6f | 6f 64 20 69 6e 20 74 68 | just fo|od in th|
|000031c0| 65 69 72 20 73 74 6f 6d | 61 63 68 2e 20 54 68 65 |eir stom|ach. The|
|000031d0| 20 73 74 6f 6d 61 63 68 | 73 20 6f 66 20 6d 61 6e | stomach|s of man|
|000031e0| 79 20 63 61 70 74 75 72 | 65 64 20 73 68 61 72 6b |y captur|ed shark|
|000031f0| 73 20 68 61 76 65 20 69 | 6e 63 6c 75 64 65 64 20 |s have i|ncluded |
|00003200| 69 74 65 6d 73 20 73 75 | 63 68 20 61 73 20 63 61 |items su|ch as ca|
|00003210| 6e 73 2c 20 73 68 6f 65 | 73 2d 2d 65 76 65 6e 20 |ns, shoe|s--even |
|00003220| 74 69 72 65 73 2e 20 0a | 09 4d 6f 73 74 20 73 68 |tires. .|.Most sh|
|00003230| 61 72 6b 73 20 65 61 74 | 20 6f 6e 63 65 20 65 76 |arks eat| once ev|
|00003240| 65 72 79 20 6f 6e 65 20 | 6f 72 20 74 77 6f 20 64 |ery one |or two d|
|00003250| 61 79 73 2e 20 49 74 20 | 75 73 75 61 6c 6c 79 20 |ays. It |usually |
|00003260| 74 61 6b 65 73 20 32 34 | 20 68 6f 75 72 73 20 66 |takes 24| hours f|
|00003270| 6f 72 20 61 20 73 68 61 | 72 6b 20 74 6f 20 66 75 |or a sha|rk to fu|
|00003280| 6c 6c 79 20 64 69 67 65 | 73 74 20 69 74 73 20 66 |lly dige|st its f|
|00003290| 6f 6f 64 2e 20 53 6f 6d | 65 20 73 68 61 72 6b 73 |ood. Som|e sharks|
|000032a0| 2c 20 6c 69 6b 65 20 74 | 68 65 20 67 72 65 61 74 |, like t|he great|
|000032b0| 20 77 68 69 74 65 20 73 | 68 61 72 6b 2c 20 63 61 | white s|hark, ca|
|000032c0| 6e 20 65 61 74 20 61 20 | 73 69 6e 67 6c 65 20 65 |n eat a |single e|
|000032d0| 6e 6f 72 6d 6f 75 73 20 | 6d 65 61 6c 20 61 6e 64 |normous |meal and|
|000032e0| 20 74 68 65 6e 20 77 61 | 69 74 20 61 73 20 6d 75 | then wa|it as mu|
|000032f0| 63 68 20 61 73 20 74 77 | 6f 20 6d 6f 6e 74 68 73 |ch as tw|o months|
|00003300| 20 62 65 66 6f 72 65 20 | 66 65 65 64 69 6e 67 20 | before |feeding |
|00003310| 61 67 61 69 6e 2e 20 4f | 6e 63 65 20 61 20 73 68 |again. O|nce a sh|
|00003320| 61 72 6b 27 73 20 66 6f | 6f 64 20 69 73 20 73 77 |ark's fo|od is sw|
|00003330| 61 6c 6c 6f 77 65 64 2c | 20 69 74 20 65 6e 74 65 |allowed,| it ente|
|00003340| 72 73 20 74 68 65 20 73 | 74 6f 6d 61 63 68 20 77 |rs the s|tomach w|
|00003350| 68 65 72 65 20 69 74 20 | 69 73 20 62 72 6f 6b 65 |here it |is broke|
|00003360| 6e 20 64 6f 77 6e 20 62 | 79 20 64 69 67 65 73 74 |n down b|y digest|
|00003370| 69 76 65 20 65 6e 7a 79 | 6d 65 73 20 69 6e 74 6f |ive enzy|mes into|
|00003380| 20 73 6d 61 6c 6c 20 70 | 69 65 63 65 73 20 74 68 | small p|ieces th|
|00003390| 61 74 20 61 72 65 20 6d | 6f 72 65 20 65 61 73 69 |at are m|ore easi|
|000033a0| 6c 79 20 64 69 67 65 73 | 74 65 64 2e 20 41 66 74 |ly diges|ted. Aft|
|000033b0| 65 72 20 74 68 65 20 66 | 6f 6f 64 20 6d 6f 76 65 |er the f|ood move|
|000033c0| 73 20 74 68 72 6f 75 67 | 68 20 74 68 65 20 73 74 |s throug|h the st|
|000033d0| 6f 6d 61 63 68 2c 20 69 | 74 20 70 61 73 73 65 73 |omach, i|t passes|
|000033e0| 20 69 6e 74 6f 20 74 68 | 65 20 73 68 61 72 6b 27 | into th|e shark'|
|000033f0| 73 20 69 6e 74 65 73 74 | 69 6e 65 2c 20 77 68 65 |s intest|ine, whe|
|00003400| 72 65 20 6d 75 63 68 20 | 6f 66 20 69 74 20 69 73 |re much |of it is|
|00003410| 20 61 62 73 6f 72 62 65 | 64 20 62 79 20 74 68 65 | absorbe|d by the|
|00003420| 20 73 68 61 72 6b 27 73 | 20 62 6c 6f 6f 64 20 61 | shark's| blood a|
|00003430| 6e 64 20 75 73 65 64 20 | 61 73 20 66 75 65 6c 20 |nd used |as fuel |
|00003440| 66 6f 72 20 74 68 65 20 | 73 68 61 72 6b 27 73 20 |for the |shark's |
|00003450| 70 68 79 73 69 63 61 6c | 20 61 63 74 69 76 69 74 |physical| activit|
|00003460| 69 65 73 2e 20 0a 09 4a | 75 73 74 20 62 65 6c 6f |ies. ..J|ust belo|
|00003470| 77 20 74 68 65 20 73 68 | 61 72 6b 27 73 20 73 74 |w the sh|ark's st|
|00003480| 6f 6d 61 63 68 20 69 73 | 20 69 74 73 20 6c 69 76 |omach is| its liv|
|00003490| 65 72 2e 20 41 6c 6d 6f | 73 74 20 61 6c 6c 20 73 |er. Almo|st all s|
|000034a0| 68 61 72 6b 73 20 68 61 | 76 65 20 61 6e 20 65 6e |harks ha|ve an en|
|000034b0| 6f 72 6d 6f 75 73 20 6c | 69 76 65 72 20 74 6f 20 |ormous l|iver to |
|000034c0| 68 65 6c 70 20 74 68 65 | 6d 20 72 65 6d 61 69 6e |help the|m remain|
|000034d0| 20 62 75 6f 79 61 6e 74 | 20 69 6e 20 74 68 65 20 | buoyant| in the |
|000034e0| 77 61 74 65 72 2e 20 55 | 6e 6c 69 6b 65 20 6f 74 |water. U|nlike ot|
|000034f0| 68 65 72 20 66 69 73 68 | 2c 20 73 68 61 72 6b 73 |her fish|, sharks|
|00003500| 20 64 6f 20 6e 6f 74 20 | 68 61 76 65 20 61 20 73 | do not |have a s|
|00003510| 77 69 6d 20 62 6c 61 64 | 64 65 72 2c 20 77 68 69 |wim blad|der, whi|
|00003520| 63 68 20 68 65 6c 70 73 | 20 74 6f 20 6b 65 65 70 |ch helps| to keep|
|00003530| 20 61 20 66 69 73 68 27 | 73 20 62 6f 64 79 20 73 | a fish'|s body s|
|00003540| 74 61 62 6c 65 20 69 6e | 20 74 68 65 20 77 61 74 |table in| the wat|
|00003550| 65 72 2e 20 54 6f 20 6d | 61 6b 65 20 75 70 20 66 |er. To m|ake up f|
|00003560| 6f 72 20 74 68 69 73 2c | 20 74 68 65 20 73 68 61 |or this,| the sha|
|00003570| 72 6b 27 73 20 6c 61 72 | 67 65 20 6c 69 76 65 72 |rk's lar|ge liver|
|00003580| 20 69 73 20 66 69 6c 6c | 65 64 20 77 69 74 68 20 | is fill|ed with |
|00003590| 6f 69 6c 20 74 68 61 74 | 20 69 73 20 6c 69 67 68 |oil that| is ligh|
|000035a0| 74 65 72 20 74 68 61 6e | 20 77 61 74 65 72 20 73 |ter than| water s|
|000035b0| 6f 20 74 68 65 20 73 68 | 61 72 6b 20 61 63 74 75 |o the sh|ark actu|
|000035c0| 61 6c 6c 79 20 63 61 6e | 20 66 6c 6f 61 74 2e 20 |ally can| float. |
|000035d0| 53 6f 6d 65 20 73 68 61 | 72 6b 27 73 20 68 61 76 |Some sha|rk's hav|
|000035e0| 65 20 6c 69 76 65 72 73 | 20 74 68 61 74 20 77 65 |e livers| that we|
|000035f0| 69 67 68 20 61 73 20 6d | 75 63 68 20 61 73 20 32 |igh as m|uch as 2|
|00003600| 30 30 20 70 6f 75 6e 64 | 73 2e 20 0a 99 01 4c 6f |00 pound|s. ...Lo|
|00003610| 62 73 74 65 72 20 47 69 | 6c 6c 73 0a 0a 4c 4f 42 |bster Gi|lls..LOB|
|00003620| 53 54 45 52 20 47 49 4c | 4c 53 20 0a 09 41 20 6c |STER GIL|LS ..A l|
|00003630| 6f 62 73 74 65 72 27 73 | 20 67 69 6c 6c 73 20 61 |obster's| gills a|
|00003640| 72 65 20 6c 6f 63 61 74 | 65 64 20 6e 65 61 72 20 |re locat|ed near |
|00003650| 74 68 65 20 73 70 6f 74 | 20 77 68 65 72 65 20 69 |the spot| where i|
|00003660| 74 73 20 6c 65 67 73 20 | 61 72 65 20 61 74 74 61 |ts legs |are atta|
|00003670| 63 68 65 64 20 74 6f 20 | 69 74 73 20 62 6f 64 79 |ched to |its body|
|00003680| 2e 20 4c 6f 62 73 74 65 | 72 73 20 63 6f 6c 6c 65 |. Lobste|rs colle|
|00003690| 63 74 20 6f 78 79 67 65 | 6e 20 66 72 6f 6d 20 74 |ct oxyge|n from t|
|000036a0| 68 65 20 77 61 74 65 72 | 20 61 6e 64 20 69 6e 74 |he water| and int|
|000036b0| 6f 20 74 68 65 69 72 20 | 67 69 6c 6c 73 20 62 79 |o their |gills by|
|000036c0| 20 63 6f 6e 73 74 61 6e | 74 6c 79 20 77 61 76 69 | constan|tly wavi|
|000036d0| 6e 67 20 74 68 65 69 72 | 20 6c 65 67 73 2e 20 41 |ng their| legs. A|
|000036e0| 66 74 65 72 20 6f 78 79 | 67 65 6e 20 68 61 73 20 |fter oxy|gen has |
|000036f0| 62 65 65 6e 20 72 65 6d | 6f 76 65 64 20 66 72 6f |been rem|oved fro|
|00003700| 6d 20 74 68 65 20 77 61 | 74 65 72 20 62 79 20 74 |m the wa|ter by t|
|00003710| 68 65 20 67 69 6c 6c 73 | 2c 20 74 68 65 20 6f 78 |he gills|, the ox|
|00003720| 79 67 65 6e 20 70 61 73 | 73 65 73 20 6f 75 74 20 |ygen pas|ses out |
|00003730| 6f 66 20 74 68 65 20 6c | 6f 62 73 74 65 72 27 73 |of the l|obster's|
|00003740| 20 62 6f 64 79 20 74 68 | 72 6f 75 67 68 20 61 6e | body th|rough an|
|00003750| 20 6f 70 65 6e 69 6e 67 | 20 6e 65 61 72 20 69 74 | opening| near it|
|00003760| 73 20 6d 6f 75 74 68 2e | 20 54 68 65 20 66 65 6d |s mouth.| The fem|
|00003770| 61 6c 65 20 6c 6f 62 73 | 74 65 72 73 20 63 61 72 |ale lobs|ters car|
|00003780| 72 79 20 74 68 65 69 72 | 20 65 67 67 73 20 62 65 |ry their| eggs be|
|00003790| 74 77 65 65 6e 20 74 68 | 65 69 72 20 67 69 6c 6c |tween th|eir gill|
|000037a0| 73 20 61 6e 64 20 6c 6f | 77 65 72 20 61 62 64 6f |s and lo|wer abdo|
|000037b0| 6d 65 6e 2e 20 0a be 01 | 4c 6f 62 73 74 65 72 20 |men. ...|Lobster |
|000037c0| 41 6e 74 65 6e 6e 61 65 | 0a 0a 4c 4f 42 53 54 45 |Antennae|..LOBSTE|
|000037d0| 52 20 41 4e 54 45 4e 4e | 41 45 20 0a 09 54 68 65 |R ANTENN|AE ..The|
|000037e0| 20 6c 6f 62 73 74 65 72 | 27 73 20 6c 6f 6e 67 2c | lobster|'s long,|
|000037f0| 20 73 65 6e 73 69 74 69 | 76 65 20 61 6e 74 65 6e | sensiti|ve anten|
|00003800| 6e 61 65 20 61 72 65 20 | 75 73 65 64 20 74 6f 20 |nae are |used to |
|00003810| 68 65 6c 70 20 69 74 20 | 6c 65 61 72 6e 20 61 62 |help it |learn ab|
|00003820| 6f 75 74 20 61 70 70 72 | 6f 61 63 68 69 6e 67 20 |out appr|oaching |
|00003830| 6f 62 6a 65 63 74 73 2e | 20 4c 6f 62 73 74 65 72 |objects.| Lobster|
|00003840| 73 20 77 61 76 65 20 74 | 68 65 69 72 20 61 6e 74 |s wave t|heir ant|
|00003850| 65 6e 6e 61 65 20 69 6e | 20 66 72 6f 6e 74 20 74 |ennae in| front t|
|00003860| 68 65 6d 20 61 73 20 74 | 68 65 79 20 77 61 6c 6b |hem as t|hey walk|
|00003870| 2e 20 54 68 65 20 61 6e | 74 65 6e 6e 61 65 20 74 |. The an|tennae t|
|00003880| 65 6c 6c 20 74 68 65 20 | 6c 6f 62 73 74 65 72 20 |ell the |lobster |
|00003890| 77 68 65 74 68 65 72 20 | 74 6f 20 61 74 74 61 63 |whether |to attac|
|000038a0| 6b 20 6f 72 20 72 65 74 | 72 65 61 74 2e 20 53 6f |k or ret|reat. So|
|000038b0| 6d 65 20 6c 6f 62 73 74 | 65 72 73 20 68 61 76 65 |me lobst|ers have|
|000038c0| 20 61 6e 74 65 6e 6e 61 | 65 20 74 68 61 74 20 61 | antenna|e that a|
|000038d0| 72 65 20 73 6f 20 73 65 | 6e 73 69 74 69 76 65 20 |re so se|nsitive |
|000038e0| 74 68 61 74 20 74 68 65 | 79 20 63 61 6e 20 22 73 |that the|y can "s|
|000038f0| 6d 65 6c 6c 22 20 63 65 | 72 74 61 69 6e 20 6b 69 |mell" ce|rtain ki|
|00003900| 6e 64 73 20 6f 66 20 75 | 6e 64 65 72 73 65 61 20 |nds of u|ndersea |
|00003910| 6c 69 66 65 20 66 6f 72 | 6d 73 2e 20 4f 74 68 65 |life for|ms. Othe|
|00003920| 72 20 6c 6f 62 73 74 65 | 72 73 20 75 73 65 20 74 |r lobste|rs use t|
|00003930| 68 65 69 72 20 61 6e 74 | 65 6e 6e 61 65 20 74 6f |heir ant|ennae to|
|00003940| 20 63 68 75 72 6e 20 75 | 70 20 74 68 65 20 77 61 | churn u|p the wa|
|00003950| 74 65 72 20 69 6e 20 66 | 72 6f 6e 74 20 6f 66 20 |ter in f|ront of |
|00003960| 74 68 65 6d 20 61 6e 64 | 20 64 72 61 77 20 66 6f |them and| draw fo|
|00003970| 6f 64 20 74 6f 77 61 72 | 64 20 74 68 65 69 72 20 |od towar|d their |
|00003980| 6d 6f 75 74 68 2e 20 0a | 7f 02 4c 6f 62 73 74 65 |mouth. .|..Lobste|
|00003990| 72 20 53 68 65 6c 6c 0a | 0a 4c 4f 42 53 54 45 52 |r Shell.|.LOBSTER|
|000039a0| 20 53 48 45 4c 4c 20 0a | 09 41 20 6c 6f 62 73 74 | SHELL .|.A lobst|
|000039b0| 65 72 27 73 20 73 68 65 | 6c 6c 20 69 73 20 76 65 |er's she|ll is ve|
|000039c0| 72 79 20 68 61 72 64 20 | 61 6e 64 20 63 6f 76 65 |ry hard |and cove|
|000039d0| 72 65 64 20 77 69 74 68 | 20 73 68 61 72 70 20 73 |red with| sharp s|
|000039e0| 70 69 6e 65 73 2c 20 77 | 68 69 63 68 20 61 72 65 |pines, w|hich are|
|000039f0| 20 75 73 65 64 20 74 6f | 20 77 61 72 64 20 6f 66 | used to| ward of|
|00003a00| 66 20 65 6e 65 6d 69 65 | 73 2e 20 54 68 69 73 20 |f enemie|s. This |
|00003a10| 73 68 65 6c 6c 20 69 73 | 20 6d 61 64 65 20 75 70 |shell is| made up|
|00003a20| 20 6f 66 20 64 69 66 66 | 65 72 65 6e 74 20 70 69 | of diff|erent pi|
|00003a30| 65 63 65 73 20 74 68 61 | 74 20 61 72 65 20 63 6f |eces tha|t are co|
|00003a40| 6e 6e 65 63 74 65 64 20 | 74 6f 20 65 61 63 68 20 |nnected |to each |
|00003a50| 6f 74 68 65 72 20 61 74 | 20 6a 6f 69 6e 74 73 20 |other at| joints |
|00003a60| 61 72 6f 75 6e 64 20 74 | 68 65 20 6c 6f 62 73 74 |around t|he lobst|
|00003a70| 65 72 27 73 20 62 6f 64 | 79 2e 20 45 76 65 72 79 |er's bod|y. Every|
|00003a80| 20 74 68 72 65 65 20 74 | 6f 20 66 6f 75 72 20 6d | three t|o four m|
|00003a90| 6f 6e 74 68 73 2c 20 61 | 20 6c 6f 62 73 74 65 72 |onths, a| lobster|
|00003aa0| 20 6f 75 74 67 72 6f 77 | 73 20 69 74 73 20 73 68 | outgrow|s its sh|
|00003ab0| 65 6c 6c 20 61 6e 64 20 | 6d 75 73 74 20 72 65 70 |ell and |must rep|
|00003ac0| 6c 61 63 65 20 69 74 20 | 77 69 74 68 20 61 20 6e |lace it |with a n|
|00003ad0| 65 77 20 6f 6e 65 2e 20 | 57 68 65 6e 20 74 68 69 |ew one. |When thi|
|00003ae0| 73 20 68 61 70 70 65 6e | 73 2c 20 74 68 65 20 6c |s happen|s, the l|
|00003af0| 6f 62 73 74 65 72 27 73 | 20 6f 6c 64 20 73 68 65 |obster's| old she|
|00003b00| 6c 6c 20 62 65 63 6f 6d | 65 73 20 73 6f 66 74 20 |ll becom|es soft |
|00003b10| 61 6e 64 20 66 61 6c 6c | 73 20 6f 66 66 20 69 74 |and fall|s off it|
|00003b20| 73 20 62 6f 64 79 2e 20 | 49 74 20 74 68 65 6e 20 |s body. |It then |
|00003b30| 74 61 6b 65 73 20 74 68 | 72 65 65 20 74 6f 20 66 |takes th|ree to f|
|00003b40| 6f 75 72 20 68 6f 75 72 | 73 20 66 6f 72 20 74 68 |our hour|s for th|
|00003b50| 65 20 6c 6f 62 73 74 65 | 72 27 73 20 6e 65 77 20 |e lobste|r's new |
|00003b60| 73 6b 69 6e 20 75 6e 64 | 65 72 6e 65 61 74 68 20 |skin und|erneath |
|00003b70| 74 6f 20 68 61 72 64 65 | 6e 2e 20 44 75 72 69 6e |to harde|n. Durin|
|00003b80| 67 20 74 68 69 73 20 74 | 69 6d 65 2c 20 74 68 65 |g this t|ime, the|
|00003b90| 20 6c 6f 62 73 74 65 72 | 20 69 73 20 61 6c 6d 6f | lobster| is almo|
|00003ba0| 73 74 20 63 6f 6d 70 6c | 65 74 65 6c 79 20 68 65 |st compl|etely he|
|00003bb0| 6c 70 6c 65 73 73 20 61 | 6e 64 20 6f 66 74 65 6e |lpless a|nd often|
|00003bc0| 20 68 69 64 65 73 20 64 | 65 65 70 20 69 6e 20 63 | hides d|eep in c|
|00003bd0| 61 76 65 73 20 73 6f 20 | 74 68 61 74 20 69 74 20 |aves so |that it |
|00003be0| 77 69 6c 6c 20 6e 6f 74 | 20 62 65 63 6f 6d 65 20 |will not| become |
|00003bf0| 61 20 74 61 73 74 79 20 | 74 72 65 61 74 20 66 6f |a tasty |treat fo|
|00003c00| 72 20 73 6f 6d 65 20 6c | 75 63 6b 79 20 70 72 65 |r some l|ucky pre|
|00003c10| 64 61 74 6f 72 2e 20 0a | 10 02 4c 6f 62 73 74 65 |dator. .|..Lobste|
|00003c20| 72 20 50 69 6e 63 65 72 | 0a 0a 4c 4f 42 53 54 45 |r Pincer|..LOBSTE|
|00003c30| 52 20 50 49 4e 43 45 52 | 20 0a 09 54 68 65 20 6c |R PINCER| ..The l|
|00003c40| 61 72 67 65 20 63 6c 61 | 77 73 20 6f 72 20 70 69 |arge cla|ws or pi|
|00003c50| 6e 63 65 72 73 20 61 72 | 65 20 66 6f 75 6e 64 20 |ncers ar|e found |
|00003c60| 6f 6e 20 74 68 65 20 66 | 69 72 73 74 20 6f 66 20 |on the f|irst of |
|00003c70| 66 69 76 65 20 77 61 6c | 6b 69 6e 67 20 6c 65 67 |five wal|king leg|
|00003c80| 73 20 6f 6e 20 65 61 63 | 68 20 73 69 64 65 20 6f |s on eac|h side o|
|00003c90| 66 20 74 68 65 20 6c 6f | 62 73 74 65 72 2e 20 54 |f the lo|bster. T|
|00003ca0| 68 65 79 20 61 72 65 20 | 75 73 65 64 20 66 6f 72 |hey are |used for|
|00003cb0| 20 6d 6f 76 69 6e 67 20 | 6f 76 65 72 20 74 68 65 | moving |over the|
|00003cc0| 20 6f 63 65 61 6e 20 66 | 6c 6f 6f 72 2c 20 61 6e | ocean f|loor, an|
|00003cd0| 64 20 66 6f 72 20 67 72 | 61 73 70 69 6e 67 20 66 |d for gr|asping f|
|00003ce0| 6f 6f 64 20 77 68 69 6c | 65 20 69 74 20 69 73 20 |ood whil|e it is |
|00003cf0| 62 65 69 6e 67 20 74 6f | 72 6e 20 61 70 61 72 74 |being to|rn apart|
|00003d00| 2e 20 41 20 6c 6f 62 73 | 74 65 72 27 73 20 70 69 |. A lobs|ter's pi|
|00003d10| 6e 63 65 72 20 69 73 20 | 6c 6f 61 64 65 64 20 77 |ncer is |loaded w|
|00003d20| 69 74 68 20 6d 75 73 63 | 6c 65 2c 20 67 69 76 69 |ith musc|le, givi|
|00003d30| 6e 67 20 74 68 65 20 6c | 6f 62 73 74 65 72 20 61 |ng the l|obster a|
|00003d40| 20 70 6f 77 65 72 66 75 | 6c 20 67 72 69 70 2e 20 | powerfu|l grip. |
|00003d50| 45 61 63 68 20 70 69 6e | 63 65 72 20 69 73 20 61 |Each pin|cer is a|
|00003d60| 6c 73 6f 20 65 71 75 69 | 70 70 65 64 20 77 69 74 |lso equi|pped wit|
|00003d70| 68 20 73 74 72 6f 6e 67 | 2c 20 73 74 69 66 66 20 |h strong|, stiff |
|00003d80| 62 72 69 73 74 6c 65 73 | 20 61 74 20 74 68 65 20 |bristles| at the |
|00003d90| 74 69 70 73 20 66 6f 72 | 20 67 72 61 73 70 69 6e |tips for| graspin|
|00003da0| 67 2e 20 4f 66 74 65 6e | 2c 20 6c 6f 62 73 74 65 |g. Often|, lobste|
|00003db0| 72 73 20 77 69 6c 6c 20 | 6c 6f 73 65 20 61 20 6c |rs will |lose a l|
|00003dc0| 61 72 67 65 20 70 69 6e | 63 65 72 20 69 6e 20 63 |arge pin|cer in c|
|00003dd0| 6f 6d 62 61 74 20 77 69 | 74 68 20 61 20 70 72 65 |ombat wi|th a pre|
|00003de0| 64 61 74 6f 72 20 6f 72 | 20 61 6e 6f 74 68 65 72 |dator or| another|
|00003df0| 20 6c 6f 62 73 74 65 72 | 2e 20 53 6f 6d 65 20 6c | lobster|. Some l|
|00003e00| 6f 62 73 74 65 72 73 20 | 63 61 6e 20 67 72 6f 77 |obsters |can grow|
|00003e10| 20 62 61 63 6b 20 74 68 | 65 20 6c 6f 73 74 20 70 | back th|e lost p|
|00003e20| 69 6e 63 65 72 20 69 6e | 20 73 65 76 65 72 61 6c |incer in| several|
|00003e30| 20 6d 6f 6e 74 68 73 2e | 20 0a 1e 02 4c 6f 62 73 | months.| ...Lobs|
|00003e40| 74 65 72 20 45 79 65 73 | 0a 0a 4c 4f 42 53 54 45 |ter Eyes|..LOBSTE|
|00003e50| 52 20 45 59 45 53 20 0a | 09 41 20 6c 6f 62 73 74 |R EYES .|.A lobst|
|00003e60| 65 72 27 73 20 65 79 65 | 20 69 73 20 6c 6f 63 61 |er's eye| is loca|
|00003e70| 74 65 64 20 61 74 20 74 | 68 65 20 65 6e 64 20 6f |ted at t|he end o|
|00003e80| 66 20 61 20 6c 6f 6e 67 | 2c 20 6d 6f 76 61 62 6c |f a long|, movabl|
|00003e90| 65 20 73 74 61 6c 6b 2e | 20 54 68 65 20 65 79 65 |e stalk.| The eye|
|00003ea0| 20 68 61 73 20 61 20 68 | 61 72 64 2c 20 63 75 72 | has a h|ard, cur|
|00003eb0| 76 65 64 20 73 75 72 66 | 61 63 65 20 74 68 61 74 |ved surf|ace that|
|00003ec0| 20 69 73 20 6d 61 64 65 | 20 75 70 20 6f 66 20 74 | is made| up of t|
|00003ed0| 68 6f 75 73 61 6e 64 73 | 20 6f 66 20 74 69 6e 79 |housands| of tiny|
|00003ee0| 20 6c 65 6e 73 65 73 2e | 20 45 61 63 68 20 6f 66 | lenses.| Each of|
|00003ef0| 20 74 68 65 73 65 20 6c | 65 6e 73 65 73 20 61 63 | these l|enses ac|
|00003f00| 74 73 20 6c 69 6b 65 20 | 61 20 73 65 70 61 72 61 |ts like |a separa|
|00003f10| 74 65 20 65 79 65 2c 20 | 64 65 74 65 63 74 69 6e |te eye, |detectin|
|00003f20| 67 20 64 69 66 66 65 72 | 65 6e 63 65 73 20 69 6e |g differ|ences in|
|00003f30| 20 6c 69 67 68 74 20 61 | 6e 64 20 64 61 72 6b 2e | light a|nd dark.|
|00003f40| 20 53 6f 6d 65 20 6c 6f | 62 73 74 65 72 73 20 61 | Some lo|bsters a|
|00003f50| 72 65 20 63 61 70 61 62 | 6c 65 20 6f 66 20 73 65 |re capab|le of se|
|00003f60| 65 69 6e 67 20 63 65 72 | 74 61 69 6e 20 63 6f 6c |eing cer|tain col|
|00003f70| 6f 72 73 20 73 75 63 68 | 20 61 73 20 62 6c 75 65 |ors such| as blue|
|00003f80| 20 61 6e 64 20 67 72 65 | 65 6e 2e 20 42 65 63 61 | and gre|en. Beca|
|00003f90| 75 73 65 20 74 68 65 20 | 73 75 72 66 61 63 65 20 |use the |surface |
|00003fa0| 6f 66 20 61 20 6c 6f 62 | 73 74 65 72 27 73 20 65 |of a lob|ster's e|
|00003fb0| 79 65 20 69 73 20 73 6f | 20 6c 61 72 67 65 2c 20 |ye is so| large, |
|00003fc0| 6c 6f 62 73 74 65 72 73 | 20 73 65 65 20 6d 6f 76 |lobsters| see mov|
|00003fd0| 65 6d 65 6e 74 73 20 6f | 76 65 72 20 61 20 76 65 |ements o|ver a ve|
|00003fe0| 72 79 20 77 69 64 65 20 | 61 6e 67 6c 65 2c 20 6c |ry wide |angle, l|
|00003ff0| 69 6b 65 20 74 68 65 20 | 77 69 64 65 2d 61 6e 67 |ike the |wide-ang|
|00004000| 6c 65 20 6c 65 6e 73 20 | 6f 66 20 61 20 63 61 6d |le lens |of a cam|
|00004010| 65 72 61 2e 20 4c 6f 62 | 73 74 65 72 73 20 61 72 |era. Lob|sters ar|
|00004020| 65 20 70 72 6f 62 61 62 | 6c 79 20 61 62 6c 65 20 |e probab|ly able |
|00004030| 74 6f 20 6d 61 6b 65 20 | 6f 75 74 20 74 68 65 20 |to make |out the |
|00004040| 66 6f 72 6d 73 20 61 6e | 64 20 73 68 61 70 65 73 |forms an|d shapes|
|00004050| 20 6f 66 20 64 69 66 66 | 65 72 65 6e 74 20 6f 62 | of diff|erent ob|
|00004060| 6a 65 63 74 73 2e 20 0a | 38 01 4c 6f 62 73 74 65 |jects. .|8.Lobste|
|00004070| 72 20 54 61 69 6c 0a 0a | 4c 4f 42 53 54 45 52 20 |r Tail..|LOBSTER |
|00004080| 54 41 49 4c 20 0a 09 54 | 68 65 20 6c 6f 62 73 74 |TAIL ..T|he lobst|
|00004090| 65 72 20 68 61 73 20 73 | 74 72 6f 6e 67 20 6d 75 |er has s|trong mu|
|000040a0| 73 63 6c 65 73 20 69 6e | 20 69 74 73 20 74 61 69 |scles in| its tai|
|000040b0| 6c 20 77 68 69 63 68 20 | 63 61 6e 20 70 75 6c 6c |l which |can pull|
|000040c0| 20 74 68 65 20 74 61 69 | 6c 20 64 6f 77 6e 20 61 | the tai|l down a|
|000040d0| 6e 64 20 66 6f 72 77 61 | 72 64 20 76 65 72 79 20 |nd forwa|rd very |
|000040e0| 71 75 69 63 6b 6c 79 2e | 20 54 68 69 73 20 6d 6f |quickly.| This mo|
|000040f0| 76 65 6d 65 6e 74 20 63 | 61 6e 20 70 72 6f 70 65 |vement c|an prope|
|00004100| 6c 20 74 68 65 20 6c 6f | 62 73 74 65 72 20 62 61 |l the lo|bster ba|
|00004110| 63 6b 77 61 72 64 20 61 | 74 20 68 69 67 68 20 73 |ckward a|t high s|
|00004120| 70 65 65 64 73 20 62 79 | 20 70 75 73 68 69 6e 67 |peeds by| pushing|
|00004130| 20 74 68 65 20 77 61 74 | 65 72 20 62 65 6e 65 61 | the wat|er benea|
|00004140| 74 68 20 74 68 65 20 74 | 61 69 6c 20 66 6f 72 77 |th the t|ail forw|
|00004150| 61 72 64 2e 20 57 68 65 | 6e 20 74 68 72 65 61 74 |ard. Whe|n threat|
|00004160| 65 6e 65 64 2c 20 61 20 | 6c 6f 62 73 74 65 72 20 |ened, a |lobster |
|00004170| 77 69 6c 6c 20 6f 66 74 | 65 6e 20 75 73 65 20 69 |will oft|en use i|
|00004180| 74 73 20 74 61 69 6c 20 | 74 6f 20 6d 6f 76 65 20 |ts tail |to move |
|00004190| 62 61 63 6b 77 61 72 64 | 20 61 6e 64 20 61 77 61 |backward| and awa|
|000041a0| 79 20 66 72 6f 6d 20 64 | 61 6e 67 65 72 2e 20 0a |y from d|anger. .|
|000041b0| 32 02 4f 63 74 6f 70 75 | 73 20 41 72 6d 73 0a 0a |2.Octopu|s Arms..|
|000041c0| 4f 43 54 4f 50 55 53 20 | 41 52 4d 53 20 0a 09 41 |OCTOPUS |ARMS ..A|
|000041d0| 6e 20 6f 63 74 6f 70 75 | 73 20 68 61 73 20 65 69 |n octopu|s has ei|
|000041e0| 67 68 74 20 66 6c 65 78 | 69 62 6c 65 20 61 6e 64 |ght flex|ible and|
|000041f0| 20 6d 75 73 63 75 6c 61 | 72 20 61 72 6d 73 2e 20 | muscula|r arms. |
|00004200| 45 61 63 68 20 6f 66 20 | 74 68 65 73 65 20 61 72 |Each of |these ar|
|00004210| 6d 73 20 68 61 73 20 73 | 75 63 6b 65 72 73 20 6f |ms has s|uckers o|
|00004220| 6e 20 74 68 65 20 69 6e | 73 69 64 65 20 65 64 67 |n the in|side edg|
|00004230| 65 73 20 61 6e 64 20 69 | 73 20 75 73 65 64 20 62 |es and i|s used b|
|00004240| 6f 74 68 20 66 6f 72 20 | 77 61 6c 6b 69 6e 67 20 |oth for |walking |
|00004250| 6f 76 65 72 20 74 68 65 | 20 6f 63 65 61 6e 20 66 |over the| ocean f|
|00004260| 6c 6f 6f 72 20 61 6e 64 | 20 66 6f 72 20 68 6f 6c |loor and| for hol|
|00004270| 64 69 6e 67 20 6f 6e 74 | 6f 20 70 72 65 79 20 77 |ding ont|o prey w|
|00004280| 68 65 6e 20 74 68 65 20 | 6f 63 74 6f 70 75 73 20 |hen the |octopus |
|00004290| 69 73 20 65 61 74 69 6e | 67 2e 20 41 6e 20 6f 63 |is eatin|g. An oc|
|000042a0| 74 6f 70 75 73 27 73 20 | 61 72 6d 73 20 61 72 65 |topus's |arms are|
|000042b0| 20 68 69 67 68 6c 79 20 | 73 65 6e 73 69 74 69 76 | highly |sensitiv|
|000042c0| 65 20 74 6f 20 74 6f 75 | 63 68 20 61 6e 64 20 63 |e to tou|ch and c|
|000042d0| 61 6e 20 6d 61 6e 69 70 | 75 6c 61 74 65 20 76 65 |an manip|ulate ve|
|000042e0| 72 79 20 73 6d 61 6c 6c | 2c 20 66 72 61 67 69 6c |ry small|, fragil|
|000042f0| 65 20 6f 62 6a 65 63 74 | 73 2e 20 54 68 65 20 69 |e object|s. The i|
|00004300| 6e 73 69 64 65 20 6f 66 | 20 65 61 63 68 20 6f 66 |nside of| each of|
|00004310| 20 61 6e 20 6f 63 74 6f | 70 75 73 27 73 20 73 75 | an octo|pus's su|
|00004320| 63 74 69 6f 6e 20 63 75 | 70 73 20 69 73 20 6c 69 |ction cu|ps is li|
|00004330| 6e 65 64 20 62 79 20 6e | 65 72 76 65 73 20 74 68 |ned by n|erves th|
|00004340| 61 74 20 63 61 6e 20 64 | 65 74 65 63 74 20 74 68 |at can d|etect th|
|00004350| 65 20 64 69 66 66 65 72 | 65 6e 63 65 73 20 62 65 |e differ|ences be|
|00004360| 74 77 65 65 6e 20 74 68 | 65 20 74 69 6e 69 65 73 |tween th|e tinies|
|00004370| 74 20 73 68 61 70 65 73 | 2e 20 46 65 6d 61 6c 65 |t shapes|. Female|
|00004380| 20 6f 63 74 6f 70 75 73 | 65 73 20 77 69 6c 6c 20 | octopus|es will |
|00004390| 6f 66 74 65 6e 20 73 70 | 65 6e 64 20 6d 6f 6e 74 |often sp|end mont|
|000043a0| 68 73 20 6d 6f 76 69 6e | 67 20 61 6e 64 20 63 6c |hs movin|g and cl|
|000043b0| 65 61 6e 69 6e 67 20 74 | 68 65 69 72 20 66 72 61 |eaning t|heir fra|
|000043c0| 67 69 6c 65 20 65 67 67 | 73 2c 20 61 6e 64 20 6e |gile egg|s, and n|
|000043d0| 6f 6e 65 20 6f 66 20 74 | 68 65 20 65 67 67 73 20 |one of t|he eggs |
|000043e0| 77 69 6c 6c 20 62 65 20 | 64 61 6d 61 67 65 64 2e |will be |damaged.|
|000043f0| 20 0a 52 02 4f 63 74 6f | 70 75 73 20 45 79 65 73 | .R.Octo|pus Eyes|
|00004400| 0a 0a 4f 43 54 4f 50 55 | 53 20 45 59 45 20 0a 09 |..OCTOPU|S EYE ..|
|00004410| 55 6e 6c 69 6b 65 20 6d | 61 6e 79 20 75 6e 64 65 |Unlike m|any unde|
|00004420| 72 73 65 61 20 68 75 6e | 74 65 72 73 2c 20 74 68 |rsea hun|ters, th|
|00004430| 65 20 6f 63 74 6f 70 75 | 73 20 72 65 6c 69 65 73 |e octopu|s relies|
|00004440| 20 61 6c 6d 6f 73 74 20 | 65 6e 74 69 72 65 6c 79 | almost |entirely|
|00004450| 20 6f 6e 20 69 74 73 20 | 76 69 73 69 6f 6e 20 74 | on its |vision t|
|00004460| 6f 20 66 69 6e 64 20 61 | 6e 64 20 63 61 74 63 68 |o find a|nd catch|
|00004470| 20 70 72 65 79 2e 20 46 | 6f 72 20 74 68 69 73 20 | prey. F|or this |
|00004480| 72 65 61 73 6f 6e 2c 20 | 74 68 65 20 6f 63 74 6f |reason, |the octo|
|00004490| 70 75 73 27 73 20 65 79 | 65 20 69 73 20 68 69 67 |pus's ey|e is hig|
|000044a0| 68 6c 79 20 64 65 76 65 | 6c 6f 70 65 64 20 61 6e |hly deve|loped an|
|000044b0| 64 20 63 61 6e 20 70 72 | 6f 62 61 62 6c 79 20 73 |d can pr|obably s|
|000044c0| 65 65 20 69 6d 61 67 65 | 73 20 6e 65 61 72 6c 79 |ee image|s nearly|
|000044d0| 20 61 73 20 77 65 6c 6c | 20 61 73 20 61 20 68 75 | as well| as a hu|
|000044e0| 6d 61 6e 20 65 79 65 20 | 63 61 6e 2e 20 0a 09 4d |man eye |can. ..M|
|000044f0| 75 63 68 20 6f 66 20 61 | 6e 20 6f 63 74 6f 70 75 |uch of a|n octopu|
|00004500| 73 27 73 20 62 72 61 69 | 6e 20 69 73 20 64 65 76 |s's brai|n is dev|
|00004510| 6f 74 65 64 20 74 6f 20 | 69 6e 74 65 72 70 72 65 |oted to |interpre|
|00004520| 74 69 6e 67 20 74 68 65 | 20 6d 61 6e 79 20 73 69 |ting the| many si|
|00004530| 67 6e 61 6c 73 20 63 6f | 6d 69 6e 67 20 66 72 6f |gnals co|ming fro|
|00004540| 6d 20 74 68 65 20 6f 63 | 74 6f 70 75 73 27 73 20 |m the oc|topus's |
|00004550| 65 79 65 73 2e 20 54 68 | 65 20 6f 63 74 6f 70 75 |eyes. Th|e octopu|
|00004560| 73 20 65 79 65 62 61 6c | 6c 20 69 73 20 66 6c 61 |s eyebal|l is fla|
|00004570| 74 74 65 6e 65 64 20 6c | 69 6b 65 20 61 20 66 69 |ttened l|ike a fi|
|00004580| 73 68 20 65 79 65 2e 20 | 54 6f 20 66 6f 63 75 73 |sh eye. |To focus|
|00004590| 20 6f 6e 20 61 6e 20 6f | 62 6a 65 63 74 2c 20 74 | on an o|bject, t|
|000045a0| 68 65 20 6c 65 6e 73 20 | 6f 66 20 74 68 65 20 65 |he lens |of the e|
|000045b0| 79 65 20 6d 6f 76 65 73 | 20 72 61 70 69 64 6c 79 |ye moves| rapidly|
|000045c0| 20 62 61 63 6b 20 61 6e | 64 20 66 6f 72 74 68 2e | back an|d forth.|
|000045d0| 20 54 68 65 20 65 79 65 | 20 6f 66 20 61 6e 20 6f | The eye| of an o|
|000045e0| 63 74 6f 70 75 73 20 69 | 73 20 61 6c 73 6f 20 71 |ctopus i|s also q|
|000045f0| 75 69 74 65 20 6c 61 72 | 67 65 2c 20 6d 61 6b 69 |uite lar|ge, maki|
|00004600| 6e 67 20 69 74 20 65 61 | 73 79 20 66 6f 72 20 74 |ng it ea|sy for t|
|00004610| 68 65 20 6f 63 74 6f 70 | 75 73 20 74 6f 20 73 65 |he octop|us to se|
|00004620| 65 20 77 65 6c 6c 20 61 | 74 20 6e 69 67 68 74 2c |e well a|t night,|
|00004630| 20 77 68 65 6e 20 69 74 | 20 64 6f 65 73 20 6d 6f | when it| does mo|
|00004640| 73 74 20 6f 66 20 69 74 | 73 20 68 75 6e 74 69 6e |st of it|s huntin|
|00004650| 67 2e 20 0a c8 01 4f 63 | 74 6f 70 75 73 20 46 75 |g. ...Oc|topus Fu|
|00004660| 6e 6e 65 6c 0a 0a 4f 43 | 54 4f 50 55 53 20 46 55 |nnel..OC|TOPUS FU|
|00004670| 4e 4e 45 4c 20 0a 09 41 | 6e 20 6f 63 74 6f 70 75 |NNEL ..A|n octopu|
|00004680| 73 27 73 20 67 69 6c 6c | 73 20 61 72 65 20 65 6e |s's gill|s are en|
|00004690| 63 6c 6f 73 65 64 20 69 | 6e 20 61 20 6c 61 72 67 |closed i|n a larg|
|000046a0| 65 20 6d 75 73 63 75 6c | 61 72 20 63 68 61 6d 62 |e muscul|ar chamb|
|000046b0| 65 72 20 63 61 6c 6c 65 | 64 20 61 20 66 75 6e 6e |er calle|d a funn|
|000046c0| 65 6c 2e 20 54 68 69 73 | 20 63 68 61 6d 62 65 72 |el. This| chamber|
|000046d0| 20 70 75 6d 70 73 20 77 | 61 74 65 72 20 69 6e 20 | pumps w|ater in |
|000046e0| 61 6e 64 20 6f 75 74 20 | 61 6e 64 20 6f 76 65 72 |and out |and over|
|000046f0| 20 74 68 65 20 67 69 6c | 6c 73 2e 20 57 68 65 6e | the gil|ls. When|
|00004700| 20 74 68 65 20 6f 63 74 | 6f 70 75 73 20 69 73 20 | the oct|opus is |
|00004710| 69 6e 20 64 61 6e 67 65 | 72 2c 20 74 68 65 20 63 |in dange|r, the c|
|00004720| 68 61 6d 62 65 72 20 73 | 71 75 65 65 7a 65 73 20 |hamber s|queezes |
|00004730| 77 61 74 65 72 20 6f 75 | 74 20 69 6e 20 61 20 70 |water ou|t in a p|
|00004740| 6f 77 65 72 66 75 6c 20 | 67 75 73 68 2c 20 6a 65 |owerful |gush, je|
|00004750| 74 74 69 6e 67 20 74 68 | 65 20 61 6e 69 6d 61 6c |tting th|e animal|
|00004760| 20 62 61 63 6b 77 61 72 | 64 2e 20 41 6e 20 69 6e | backwar|d. An in|
|00004770| 74 65 72 6e 61 6c 20 69 | 6e 6b 20 73 61 63 20 61 |ternal i|nk sac a|
|00004780| 6c 73 6f 20 6f 70 65 6e | 73 20 69 6e 74 6f 20 74 |lso open|s into t|
|00004790| 68 69 73 20 63 68 61 6d | 62 65 72 2e 20 41 6e 20 |his cham|ber. An |
|000047a0| 6f 63 74 6f 70 75 73 20 | 77 69 6c 6c 20 73 71 75 |octopus |will squ|
|000047b0| 69 72 74 20 69 6e 6b 20 | 6f 75 74 20 74 6f 20 63 |irt ink |out to c|
|000047c0| 6f 6e 66 75 73 65 20 61 | 6e 20 69 6e 76 61 64 65 |onfuse a|n invade|
|000047d0| 72 2e 20 54 68 65 20 69 | 6e 6b 20 69 73 20 69 72 |r. The i|nk is ir|
|000047e0| 72 69 74 61 74 69 6e 67 | 20 74 6f 20 6d 61 6e 79 |ritating| to many|
|000047f0| 20 75 6e 64 65 72 73 65 | 61 20 61 6e 69 6d 61 6c | underse|a animal|
|00004800| 73 20 61 6e 64 20 6d 61 | 6b 65 73 20 69 74 20 68 |s and ma|kes it h|
|00004810| 61 72 64 20 74 6f 20 73 | 65 65 20 77 68 61 74 20 |ard to s|ee what |
|00004820| 69 73 20 67 6f 69 6e 67 | 20 6f 6e 2e 20 0a 26 03 |is going| on. .&.|
|00004830| 4f 63 74 6f 70 75 73 20 | 42 6f 64 79 0a 0a 4f 43 |Octopus |Body..OC|
|00004840| 54 4f 50 55 53 20 42 4f | 44 59 20 0a 09 54 68 65 |TOPUS BO|DY ..The|
|00004850| 20 6f 63 74 6f 70 75 73 | 27 73 20 6c 61 72 67 65 | octopus|'s large|
|00004860| 2c 20 6d 75 73 63 75 6c | 61 72 20 62 6f 64 79 20 |, muscul|ar body |
|00004870| 6d 61 79 20 6c 6f 6f 6b | 20 6c 69 6b 65 20 61 20 |may look| like a |
|00004880| 68 65 61 64 20 62 75 74 | 20 69 6e 20 66 61 63 74 |head but| in fact|
|00004890| 20 69 74 20 63 6f 6e 74 | 61 69 6e 73 20 61 6c 6c | it cont|ains all|
|000048a0| 20 6f 66 20 74 68 65 20 | 6f 63 74 6f 70 75 73 27 | of the |octopus'|
|000048b0| 73 20 6f 72 67 61 6e 73 | 2c 20 73 75 63 68 20 61 |s organs|, such a|
|000048c0| 73 20 74 68 65 20 73 74 | 6f 6d 61 63 68 2c 20 6b |s the st|omach, k|
|000048d0| 69 64 6e 65 79 2c 20 67 | 69 6c 6c 73 20 61 6e 64 |idney, g|ills and|
|000048e0| 20 62 72 61 69 6e 2e 20 | 55 6e 6c 69 6b 65 20 74 | brain. |Unlike t|
|000048f0| 68 65 20 62 6f 64 69 65 | 73 20 6f 66 20 6d 61 6e |he bodie|s of man|
|00004900| 79 20 75 6e 64 65 72 73 | 65 61 20 61 6e 69 6d 61 |y unders|ea anima|
|00004910| 6c 73 2c 20 74 68 65 20 | 6f 63 74 6f 70 75 73 27 |ls, the |octopus'|
|00004920| 73 20 62 6f 64 79 20 63 | 6f 6d 70 6c 65 74 65 6c |s body c|ompletel|
|00004930| 79 20 6c 61 63 6b 73 20 | 61 20 73 68 65 6c 6c 20 |y lacks |a shell |
|00004940| 6f 72 20 62 6f 6e 65 73 | 20 6f 66 20 61 6e 79 20 |or bones| of any |
|00004950| 6b 69 6e 64 2e 20 49 74 | 20 64 6f 65 73 20 68 61 |kind. It| does ha|
|00004960| 76 65 20 61 20 73 6f 66 | 74 2c 20 63 61 72 74 69 |ve a sof|t, carti|
|00004970| 6c 61 67 65 2d 6c 69 6b | 65 20 73 75 62 73 74 61 |lage-lik|e substa|
|00004980| 6e 63 65 20 74 68 61 74 | 20 66 6f 72 6d 73 20 61 |nce that| forms a|
|00004990| 20 70 72 6f 74 65 63 74 | 69 76 65 20 6c 61 79 65 | protect|ive laye|
|000049a0| 72 20 61 72 6f 75 6e 64 | 20 74 68 65 20 62 72 61 |r around| the bra|
|000049b0| 69 6e 2e 20 0a 09 54 68 | 65 20 73 6b 69 6e 20 6f |in. ..Th|e skin o|
|000049c0| 66 20 61 6e 20 6f 63 74 | 6f 70 75 73 20 69 73 20 |f an oct|opus is |
|000049d0| 77 65 6c 6c 20 6b 6e 6f | 77 6e 20 66 6f 72 20 69 |well kno|wn for i|
|000049e0| 74 73 20 61 62 69 6c 69 | 74 79 20 74 6f 20 63 68 |ts abili|ty to ch|
|000049f0| 61 6e 67 65 20 63 6f 6c | 6f 72 73 20 71 75 69 63 |ange col|ors quic|
|00004a00| 6b 6c 79 20 69 6e 20 6f | 72 64 65 72 20 74 6f 20 |kly in o|rder to |
|00004a10| 6d 61 74 63 68 20 74 68 | 65 20 6f 63 74 6f 70 75 |match th|e octopu|
|00004a20| 73 27 73 20 73 75 72 72 | 6f 75 6e 64 69 6e 67 73 |s's surr|oundings|
|00004a30| 2e 20 54 68 69 73 20 69 | 73 20 70 6f 73 73 69 62 |. This i|s possib|
|00004a40| 6c 65 20 62 65 63 61 75 | 73 65 20 74 68 65 20 6f |le becau|se the o|
|00004a50| 63 74 6f 70 75 73 20 68 | 61 73 20 6d 61 6e 79 20 |ctopus h|as many |
|00004a60| 64 69 66 66 65 72 65 6e | 74 20 6b 69 6e 64 73 20 |differen|t kinds |
|00004a70| 6f 66 20 63 6f 6c 6f 72 | 73 2c 20 63 61 6c 6c 65 |of color|s, calle|
|00004a80| 64 20 22 70 69 67 6d 65 | 6e 74 73 22 2c 20 69 6e |d "pigme|nts", in|
|00004a90| 20 69 74 73 20 73 6b 69 | 6e 2e 20 54 68 65 20 70 | its ski|n. The p|
|00004aa0| 69 67 6d 65 6e 74 73 20 | 61 72 65 20 68 65 6c 64 |igments |are held|
|00004ab0| 20 69 6e 20 61 20 73 6d | 61 6c 6c 20 73 61 63 20 | in a sm|all sac |
|00004ac0| 6a 75 73 74 20 75 6e 64 | 65 72 20 74 68 65 20 73 |just und|er the s|
|00004ad0| 6b 69 6e 2e 20 42 79 20 | 75 73 69 6e 67 20 69 74 |kin. By |using it|
|00004ae0| 73 20 6e 65 72 76 65 73 | 20 61 6e 64 20 6d 75 73 |s nerves| and mus|
|00004af0| 63 6c 65 73 2c 20 74 68 | 65 20 6f 63 74 6f 70 75 |cles, th|e octopu|
|00004b00| 73 20 63 61 6e 20 63 6f | 6e 74 72 6f 6c 20 68 6f |s can co|ntrol ho|
|00004b10| 77 20 6d 75 63 68 20 6f | 66 20 74 68 69 73 20 70 |w much o|f this p|
|00004b20| 69 67 6d 65 6e 74 20 69 | 73 20 72 65 6c 65 61 73 |igment i|s releas|
|00004b30| 65 64 20 69 6e 74 6f 20 | 69 74 73 20 73 6b 69 6e |ed into |its skin|
|00004b40| 2c 20 74 68 65 72 65 62 | 79 20 63 68 61 6e 67 69 |, thereb|y changi|
|00004b50| 6e 67 20 69 74 73 20 61 | 70 70 65 61 72 61 6e 63 |ng its a|ppearanc|
|00004b60| 65 2e 20 0a e5 01 4f 63 | 74 6f 70 75 73 20 4d 6f |e. ...Oc|topus Mo|
|00004b70| 75 74 68 0a 0a 4f 43 54 | 4f 50 55 53 20 4d 4f 55 |uth..OCT|OPUS MOU|
|00004b80| 54 48 20 0a 09 54 68 65 | 20 6d 6f 75 74 68 20 6f |TH ..The| mouth o|
|00004b90| 66 20 61 6e 20 6f 63 74 | 6f 70 75 73 20 69 73 20 |f an oct|opus is |
|00004ba0| 6c 6f 63 61 74 65 64 20 | 77 68 65 72 65 20 69 74 |located |where it|
|00004bb0| 73 20 74 65 6e 74 61 63 | 6c 65 73 20 61 74 74 61 |s tentac|les atta|
|00004bc0| 63 68 20 74 6f 20 69 74 | 73 20 62 6f 64 79 2e 20 |ch to it|s body. |
|00004bd0| 54 68 65 20 6f 70 65 6e | 69 6e 67 20 6f 66 20 74 |The open|ing of t|
|00004be0| 68 65 20 6d 6f 75 74 68 | 20 68 61 73 20 61 20 73 |he mouth| has a s|
|00004bf0| 6d 61 6c 6c 2c 20 70 61 | 72 72 6f 74 2d 6c 69 6b |mall, pa|rrot-lik|
|00004c00| 65 20 62 65 61 6b 2e 20 | 54 68 69 73 20 62 65 61 |e beak. |This bea|
|00004c10| 6b 20 69 73 20 71 75 69 | 74 65 20 70 6f 77 65 72 |k is qui|te power|
|00004c20| 66 75 6c 20 61 6e 64 20 | 69 73 20 75 73 65 64 20 |ful and |is used |
|00004c30| 66 6f 72 20 74 65 61 72 | 69 6e 67 20 61 70 61 72 |for tear|ing apar|
|00004c40| 74 20 66 6f 6f 64 2c 20 | 73 75 63 68 20 61 73 20 |t food, |such as |
|00004c50| 63 72 61 62 73 20 61 6e | 64 20 6c 6f 62 73 74 65 |crabs an|d lobste|
|00004c60| 72 73 2e 20 53 61 6c 69 | 76 61 72 79 20 67 6c 61 |rs. Sali|vary gla|
|00004c70| 6e 64 73 20 6e 65 61 72 | 20 74 68 65 20 62 65 61 |nds near| the bea|
|00004c80| 6b 20 73 65 63 72 65 74 | 65 20 66 6c 75 69 64 73 |k secret|e fluids|
|00004c90| 20 74 68 61 74 20 68 65 | 6c 70 20 62 72 65 61 6b | that he|lp break|
|00004ca0| 20 64 6f 77 6e 20 74 68 | 65 20 66 6f 6f 64 20 69 | down th|e food i|
|00004cb0| 6e 74 6f 20 73 6d 61 6c | 6c 65 72 20 70 69 65 63 |nto smal|ler piec|
|00004cc0| 65 73 2e 20 49 6e 20 73 | 6f 6d 65 20 73 70 65 63 |es. In s|ome spec|
|00004cd0| 69 65 73 20 6f 66 20 6f | 63 74 6f 70 75 73 2c 20 |ies of o|ctopus, |
|00004ce0| 74 68 69 73 20 66 6c 75 | 69 64 20 69 73 20 76 65 |this flu|id is ve|
|00004cf0| 72 79 20 70 6f 69 73 6f | 6e 6f 75 73 2e 20 41 20 |ry poiso|nous. A |
|00004d00| 66 65 77 20 70 65 6f 70 | 6c 65 20 68 61 76 65 20 |few peop|le have |
|00004d10| 64 69 65 64 20 66 72 6f | 6d 20 74 68 65 20 62 69 |died fro|m the bi|
|00004d20| 74 65 20 6f 66 20 61 20 | 73 6d 61 6c 6c 20 62 6c |te of a |small bl|
|00004d30| 75 65 2d 61 6e 64 2d 70 | 75 72 70 6c 65 2d 72 69 |ue-and-p|urple-ri|
|00004d40| 6e 67 65 64 20 41 75 73 | 74 72 61 6c 69 61 6e 20 |nged Aus|tralian |
|00004d50| 6f 63 74 6f 70 75 73 2e | 20 0a f6 01 4f 63 74 6f |octopus.| ...Octo|
|00004d60| 70 75 73 20 53 75 63 6b | 65 72 73 0a 0a 4f 43 54 |pus Suck|ers..OCT|
|00004d70| 4f 50 55 53 20 53 55 43 | 54 49 4f 4e 20 43 55 50 |OPUS SUC|TION CUP|
|00004d80| 53 20 0a 09 41 6e 20 6f | 63 74 6f 70 75 73 20 68 |S ..An o|ctopus h|
|00004d90| 61 73 20 73 75 63 6b 65 | 72 73 20 74 68 61 74 20 |as sucke|rs that |
|00004da0| 63 6f 76 65 72 20 74 68 | 65 20 69 6e 73 69 64 65 |cover th|e inside|
|00004db0| 20 6f 66 20 61 6c 6c 20 | 65 69 67 68 74 20 6f 66 | of all |eight of|
|00004dc0| 20 69 74 73 20 61 72 6d | 73 2e 20 54 68 65 73 65 | its arm|s. These|
|00004dd0| 20 73 75 63 6b 65 72 73 | 20 6d 61 6b 65 20 69 74 | suckers| make it|
|00004de0| 20 70 6f 73 73 69 62 6c | 65 20 66 6f 72 20 74 68 | possibl|e for th|
|00004df0| 65 20 6f 63 74 6f 70 75 | 73 20 74 6f 20 67 65 74 |e octopu|s to get|
|00004e00| 20 61 20 67 6f 6f 64 20 | 67 72 69 70 20 77 68 69 | a good |grip whi|
|00004e10| 6c 65 20 63 6c 69 6d 62 | 69 6e 67 20 6f 76 65 72 |le climb|ing over|
|00004e20| 20 73 6c 69 70 70 65 72 | 79 20 72 6f 63 6b 73 2e | slipper|y rocks.|
|00004e30| 20 54 68 65 79 20 61 6c | 73 6f 20 68 65 6c 70 20 | They al|so help |
|00004e40| 74 6f 20 68 6f 6c 64 20 | 6f 6e 74 6f 20 70 72 65 |to hold |onto pre|
|00004e50| 79 20 77 68 69 6c 65 20 | 61 6e 20 6f 63 74 6f 70 |y while |an octop|
|00004e60| 75 73 20 69 73 20 65 61 | 74 69 6e 67 2e 20 41 6e |us is ea|ting. An|
|00004e70| 20 6f 63 74 6f 70 75 73 | 27 73 20 73 75 63 6b 65 | octopus|'s sucke|
|00004e80| 72 73 20 61 72 65 20 72 | 6f 75 6e 64 20 61 6e 64 |rs are r|ound and|
|00004e90| 20 66 6c 65 73 68 79 2c | 20 61 6e 64 20 65 61 63 | fleshy,| and eac|
|00004ea0| 68 20 6f 6e 65 20 68 61 | 73 20 69 74 73 20 6f 77 |h one ha|s its ow|
|00004eb0| 6e 20 63 69 72 63 75 6c | 61 72 20 6d 75 73 63 6c |n circul|ar muscl|
|00004ec0| 65 73 20 77 68 69 63 68 | 20 68 65 6c 70 20 63 72 |es which| help cr|
|00004ed0| 65 61 74 65 20 61 20 73 | 75 63 74 69 6f 6e 20 61 |eate a s|uction a|
|00004ee0| 63 74 69 6f 6e 2e 20 54 | 68 65 20 6f 63 74 6f 70 |ction. T|he octop|
|00004ef0| 75 73 27 73 20 73 75 63 | 6b 65 72 73 20 61 72 65 |us's suc|kers are|
|00004f00| 20 61 6c 73 6f 20 72 69 | 6e 67 65 64 20 62 79 20 | also ri|nged by |
|00004f10| 6d 61 6e 79 20 73 65 6e | 73 69 74 69 76 65 20 6e |many sen|sitive n|
|00004f20| 65 72 76 65 73 20 74 68 | 61 74 20 63 61 6e 20 64 |erves th|at can d|
|00004f30| 65 74 65 63 74 20 74 68 | 65 20 64 69 66 66 65 72 |etect th|e differ|
|00004f40| 65 6e 63 65 73 20 62 65 | 74 77 65 65 6e 20 76 65 |ences be|tween ve|
|00004f50| 72 79 20 73 6d 61 6c 6c | 20 6f 62 6a 65 63 74 73 |ry small| objects|
|00004f60| 2e 20 0a 75 05 53 68 61 | 72 6b 20 45 79 65 73 0a |. .u.Sha|rk Eyes.|
|00004f70| 0a 53 48 41 52 4b 20 45 | 59 45 53 20 0a 09 43 6f |.SHARK E|YES ..Co|
|00004f80| 6e 74 72 61 72 79 20 74 | 6f 20 77 68 61 74 20 6d |ntrary t|o what m|
|00004f90| 61 6e 79 20 70 65 6f 70 | 6c 65 20 74 68 69 6e 6b |any peop|le think|
|00004fa0| 2c 20 73 68 61 72 6b 73 | 20 68 61 76 65 20 65 78 |, sharks| have ex|
|00004fb0| 63 65 6c 6c 65 6e 74 20 | 65 79 65 73 69 67 68 74 |cellent |eyesight|
|00004fc0| 2e 20 41 20 73 68 61 72 | 6b 27 73 20 65 79 65 20 |. A shar|k's eye |
|00004fd0| 63 61 6e 20 73 65 65 20 | 77 65 6c 6c 20 64 75 72 |can see |well dur|
|00004fe0| 69 6e 67 20 74 68 65 20 | 64 61 79 20 61 6e 64 20 |ing the |day and |
|00004ff0| 61 6c 73 6f 20 61 74 20 | 6e 69 67 68 74 2c 20 77 |also at |night, w|
|00005000| 68 65 6e 20 6d 61 6e 79 | 20 73 68 61 72 6b 73 20 |hen many| sharks |
|00005010| 66 65 65 64 2e 20 53 68 | 61 72 6b 73 27 20 65 79 |feed. Sh|arks' ey|
|00005020| 65 73 20 61 72 65 20 62 | 75 69 6c 74 20 76 65 72 |es are b|uilt ver|
|00005030| 79 20 6d 75 63 68 20 6c | 69 6b 65 20 68 75 6d 61 |y much l|ike huma|
|00005040| 6e 20 65 79 65 73 2c 20 | 65 78 63 65 70 74 20 74 |n eyes, |except t|
|00005050| 68 61 74 20 74 68 65 79 | 20 61 72 65 20 6d 75 63 |hat they| are muc|
|00005060| 68 20 74 68 69 6e 6e 65 | 72 2e 20 54 68 65 20 73 |h thinne|r. The s|
|00005070| 68 61 72 6b 20 65 79 65 | 20 69 73 20 63 6f 6d 70 |hark eye| is comp|
|00005080| 6f 73 65 64 20 6f 66 20 | 74 68 72 65 65 20 63 68 |osed of |three ch|
|00005090| 61 6d 62 65 72 73 3a 20 | 61 6e 20 69 72 69 73 2c |ambers: |an iris,|
|000050a0| 20 61 20 6c 65 6e 73 20 | 61 6e 64 20 61 20 72 65 | a lens |and a re|
|000050b0| 74 69 6e 61 2e 20 54 68 | 65 20 73 69 7a 65 20 6f |tina. Th|e size o|
|000050c0| 66 20 74 68 65 20 65 79 | 65 20 64 65 70 65 6e 64 |f the ey|e depend|
|000050d0| 73 20 6f 6e 20 77 68 61 | 74 20 6b 69 6e 64 20 6f |s on wha|t kind o|
|000050e0| 66 20 73 68 61 72 6b 20 | 69 74 20 69 73 20 61 6e |f shark |it is an|
|000050f0| 64 20 77 68 65 72 65 20 | 69 74 20 6c 69 76 65 73 |d where |it lives|
|00005100| 2e 20 53 68 61 72 6b 73 | 20 74 68 61 74 20 6c 69 |. Sharks| that li|
|00005110| 76 65 20 69 6e 20 73 68 | 61 6c 6c 6f 77 20 77 61 |ve in sh|allow wa|
|00005120| 74 65 72 73 2c 20 77 68 | 65 72 65 20 74 68 65 72 |ters, wh|ere ther|
|00005130| 65 20 69 73 20 70 6c 65 | 6e 74 79 20 6f 66 20 6c |e is ple|nty of l|
|00005140| 69 67 68 74 2c 20 68 61 | 76 65 20 73 6d 61 6c 6c |ight, ha|ve small|
|00005150| 65 72 20 65 79 65 73 2e | 20 54 68 65 79 20 64 6f |er eyes.| They do|
|00005160| 6e 27 74 20 6e 65 65 64 | 20 74 6f 20 63 61 70 74 |n't need| to capt|
|00005170| 75 72 65 20 61 20 6c 6f | 74 20 6f 66 20 6c 69 67 |ure a lo|t of lig|
|00005180| 68 74 20 69 6e 20 74 68 | 65 69 72 20 65 79 65 73 |ht in th|eir eyes|
|00005190| 20 74 6f 20 73 65 65 2e | 20 53 68 61 72 6b 73 20 | to see.| Sharks |
|000051a0| 74 68 61 74 20 6c 69 76 | 65 20 69 6e 20 64 65 65 |that liv|e in dee|
|000051b0| 70 65 72 20 77 61 74 65 | 72 73 2c 20 73 75 63 68 |per wate|rs, such|
|000051c0| 20 61 73 20 74 68 65 20 | 6d 61 6b 6f 20 73 68 61 | as the |mako sha|
|000051d0| 72 6b 2c 20 68 61 76 65 | 20 6d 75 63 68 20 6c 61 |rk, have| much la|
|000051e0| 72 67 65 72 20 65 79 65 | 73 20 74 6f 20 63 61 70 |rger eye|s to cap|
|000051f0| 74 75 72 65 20 61 73 20 | 6d 75 63 68 20 6c 69 67 |ture as |much lig|
|00005200| 68 74 20 61 73 20 70 6f | 73 73 69 62 6c 65 2e 20 |ht as po|ssible. |
|00005210| 0a 09 54 6f 20 68 65 6c | 70 20 73 65 65 20 69 6e |..To hel|p see in|
|00005220| 20 76 65 72 79 20 64 61 | 72 6b 20 77 61 74 65 72 | very da|rk water|
|00005230| 2c 20 73 68 61 72 6b 73 | 20 61 6c 73 6f 20 68 61 |, sharks| also ha|
|00005240| 76 65 20 61 20 73 70 65 | 63 69 61 6c 20 72 65 66 |ve a spe|cial ref|
|00005250| 6c 65 63 74 69 76 65 20 | 6c 65 6e 73 20 74 68 61 |lective |lens tha|
|00005260| 74 20 69 73 20 6c 6f 63 | 61 74 65 64 20 61 74 20 |t is loc|ated at |
|00005270| 74 68 65 20 62 61 63 6b | 20 6f 66 20 74 68 65 69 |the back| of thei|
|00005280| 72 20 65 79 65 62 61 6c | 6c 2c 20 6a 75 73 74 20 |r eyebal|l, just |
|00005290| 62 65 68 69 6e 64 20 74 | 68 65 20 72 65 74 69 6e |behind t|he retin|
|000052a0| 61 2e 20 54 68 69 73 20 | 6c 65 6e 73 20 61 63 74 |a. This |lens act|
|000052b0| 73 20 6c 69 6b 65 20 61 | 20 6d 69 72 72 6f 72 2c |s like a| mirror,|
|000052c0| 20 72 65 66 6c 65 63 74 | 69 6e 67 20 73 6d 61 6c | reflect|ing smal|
|000052d0| 6c 20 61 6d 6f 75 6e 74 | 73 20 6f 66 20 6c 69 67 |l amount|s of lig|
|000052e0| 68 74 20 69 6e 20 74 68 | 65 20 73 68 61 72 6b 27 |ht in th|e shark'|
|000052f0| 73 20 65 79 65 20 6d 61 | 6e 79 20 74 69 6d 65 73 |s eye ma|ny times|
|00005300| 20 6f 76 65 72 2e 20 49 | 74 20 69 73 20 62 65 6c | over. I|t is bel|
|00005310| 69 65 76 65 64 20 74 68 | 61 74 20 6d 6f 73 74 20 |ieved th|at most |
|00005320| 73 68 61 72 6b 73 20 73 | 65 65 20 69 6e 20 62 6c |sharks s|ee in bl|
|00005330| 61 63 6b 20 61 6e 64 20 | 77 68 69 74 65 2c 20 62 |ack and |white, b|
|00005340| 75 74 20 69 74 27 73 20 | 70 6f 73 73 69 62 6c 65 |ut it's |possible|
|00005350| 20 74 68 61 74 20 61 20 | 66 65 77 20 73 68 61 72 | that a |few shar|
|00005360| 6b 73 20 61 6c 73 6f 20 | 73 65 65 20 69 6e 20 63 |ks also |see in c|
|00005370| 6f 6c 6f 72 2e 20 0a 09 | 45 61 72 73 20 61 72 65 |olor. ..|Ears are|
|00005380| 20 6e 6f 74 20 66 6f 75 | 6e 64 20 6f 6e 20 74 68 | not fou|nd on th|
|00005390| 65 20 6f 75 74 73 69 64 | 65 20 6f 66 20 73 68 61 |e outsid|e of sha|
|000053a0| 72 6b 73 20 6f 72 20 6f | 6e 20 61 6e 79 20 6f 74 |rks or o|n any ot|
|000053b0| 68 65 72 20 66 69 73 68 | 65 73 2e 20 48 6f 77 65 |her fish|es. Howe|
|000053c0| 76 65 72 2c 20 73 68 61 | 72 6b 73 20 73 74 69 6c |ver, sha|rks stil|
|000053d0| 6c 20 68 61 76 65 20 76 | 65 72 79 20 67 6f 6f 64 |l have v|ery good|
|000053e0| 20 68 65 61 72 69 6e 67 | 2c 20 70 61 72 74 69 63 | hearing|, partic|
|000053f0| 75 6c 61 72 6c 79 20 66 | 6f 72 20 6c 6f 77 2d 66 |ularly f|or low-f|
|00005400| 72 65 71 75 65 6e 63 79 | 20 73 6f 75 6e 64 73 20 |requency| sounds |
|00005410| 6c 69 6b 65 20 74 68 6f | 73 65 20 6d 61 64 65 20 |like tho|se made |
|00005420| 62 79 20 73 74 72 75 67 | 67 6c 69 6e 67 20 66 69 |by strug|gling fi|
|00005430| 73 68 2e 20 54 68 65 20 | 73 68 61 72 6b 27 73 20 |sh. The |shark's |
|00005440| 65 61 72 20 63 6f 6e 73 | 69 73 74 73 20 6f 66 20 |ear cons|ists of |
|00005450| 61 20 73 6d 61 6c 6c 20 | 6d 65 6d 62 72 61 6e 65 |a small |membrane|
|00005460| 20 6f 66 20 73 6b 69 6e | 20 74 68 61 74 20 69 73 | of skin| that is|
|00005470| 20 61 74 74 61 63 68 65 | 64 20 74 6f 20 61 20 73 | attache|d to a s|
|00005480| 70 6f 74 20 6e 65 61 72 | 20 74 68 65 20 74 6f 70 |pot near| the top|
|00005490| 20 6f 66 20 74 68 65 20 | 68 65 61 64 2e 20 54 68 | of the |head. Th|
|000054a0| 69 73 20 70 69 65 63 65 | 20 6f 66 20 73 6b 69 6e |is piece| of skin|
|000054b0| 20 6d 6f 76 65 73 20 65 | 76 65 72 79 20 74 69 6d | moves e|very tim|
|000054c0| 65 20 74 68 65 72 65 20 | 69 73 20 61 20 76 69 62 |e there |is a vib|
|000054d0| 72 61 74 69 6f 6e 20 69 | 6e 20 74 68 65 20 77 61 |ration i|n the wa|
|000054e0| 74 65 72 2e 20 0a d8 03 | 53 68 61 72 6b 20 44 6f |ter. ...|Shark Do|
|000054f0| 72 73 61 6c 20 46 69 6e | 0a 0a 53 48 41 52 4b 20 |rsal Fin|..SHARK |
|00005500| 44 4f 52 53 41 4c 20 46 | 49 4e 20 0a 09 4e 6f 74 |DORSAL F|IN ..Not|
|00005510| 68 69 6e 67 20 73 74 72 | 69 6b 65 73 20 66 65 61 |hing str|ikes fea|
|00005520| 72 20 69 6e 20 74 68 65 | 20 68 65 61 72 74 20 6f |r in the| heart o|
|00005530| 66 20 61 20 73 77 69 6d | 6d 65 72 20 6d 6f 72 65 |f a swim|mer more|
|00005540| 20 74 68 61 6e 20 74 68 | 65 20 74 68 6f 75 67 68 | than th|e though|
|00005550| 74 20 6f 66 20 61 20 73 | 68 61 72 6b 27 73 20 64 |t of a s|hark's d|
|00005560| 6f 72 73 61 6c 20 66 69 | 6e 20 62 72 65 61 6b 69 |orsal fi|n breaki|
|00005570| 6e 67 20 74 68 65 20 73 | 75 72 66 61 63 65 20 6f |ng the s|urface o|
|00005580| 66 20 74 68 65 20 77 61 | 74 65 72 20 6e 65 61 72 |f the wa|ter near|
|00005590| 62 79 2e 20 54 68 69 73 | 20 68 69 67 68 6c 79 20 |by. This| highly |
|000055a0| 72 65 63 6f 67 6e 69 7a | 61 62 6c 65 20 66 69 6e |recogniz|able fin|
|000055b0| 20 61 63 74 73 20 6c 69 | 6b 65 20 61 20 73 61 69 | acts li|ke a sai|
|000055c0| 6c 62 6f 61 74 27 73 20 | 6b 65 65 6c 2c 20 73 74 |lboat's |keel, st|
|000055d0| 61 62 69 6c 69 7a 69 6e | 67 20 74 68 65 20 73 68 |abilizin|g the sh|
|000055e0| 61 72 6b 27 73 20 62 6f | 64 79 20 77 68 65 6e 20 |ark's bo|dy when |
|000055f0| 69 74 20 69 73 20 6d 6f | 76 69 6e 67 20 74 68 72 |it is mo|ving thr|
|00005600| 6f 75 67 68 20 74 68 65 | 20 77 61 74 65 72 2e 20 |ough the| water. |
|00005610| 57 69 74 68 6f 75 74 20 | 74 68 65 20 64 6f 72 73 |Without |the dors|
|00005620| 61 6c 20 66 69 6e 20 74 | 68 65 20 73 68 61 72 6b |al fin t|he shark|
|00005630| 20 77 6f 75 6c 64 20 62 | 65 67 69 6e 20 74 75 72 | would b|egin tur|
|00005640| 6e 69 6e 67 20 74 6f 20 | 6f 6e 65 20 73 69 64 65 |ning to |one side|
|00005650| 2c 20 73 6f 6d 65 74 68 | 69 6e 67 20 6b 6e 6f 77 |, someth|ing know|
|00005660| 6e 20 61 73 20 73 69 64 | 65 2d 73 6c 69 70 70 69 |n as sid|e-slippi|
|00005670| 6e 67 2e 20 55 6e 6c 69 | 6b 65 20 61 20 73 68 61 |ng. Unli|ke a sha|
|00005680| 72 6b 27 73 20 6f 74 68 | 65 72 20 66 69 6e 73 2c |rk's oth|er fins,|
|00005690| 20 74 68 65 20 64 6f 72 | 73 61 6c 20 66 69 6e 20 | the dor|sal fin |
|000056a0| 69 73 20 73 74 69 66 66 | 20 61 6e 64 20 69 6d 6d |is stiff| and imm|
|000056b0| 6f 76 61 62 6c 65 2e 20 | 49 74 20 69 73 20 61 6c |ovable. |It is al|
|000056c0| 73 6f 20 63 6f 6e 73 69 | 64 65 72 65 64 20 61 20 |so consi|dered a |
|000056d0| 64 65 6c 69 63 61 63 79 | 20 69 6e 20 64 69 73 68 |delicacy| in dish|
|000056e0| 65 73 20 73 75 63 68 20 | 61 73 20 73 68 61 72 6b |es such |as shark|
|000056f0| 20 66 69 6e 20 73 6f 75 | 70 2e 20 0a 09 54 68 65 | fin sou|p. ..The|
|00005700| 20 73 68 61 72 6b 27 73 | 20 70 65 63 74 6f 72 61 | shark's| pectora|
|00005710| 6c 20 66 69 6e 73 20 61 | 72 65 20 66 6c 65 78 69 |l fins a|re flexi|
|00005720| 62 6c 65 2e 20 54 68 65 | 79 20 63 61 6e 20 62 65 |ble. The|y can be|
|00005730| 20 6d 6f 76 65 64 20 75 | 70 20 61 6e 64 20 64 6f | moved u|p and do|
|00005740| 77 6e 20 74 6f 20 68 65 | 6c 70 20 73 74 65 65 72 |wn to he|lp steer|
|00005750| 20 74 68 65 20 73 68 61 | 72 6b 20 6c 65 66 74 20 | the sha|rk left |
|00005760| 61 6e 64 20 72 69 67 68 | 74 20 61 6e 64 20 75 70 |and righ|t and up|
|00005770| 20 61 6e 64 20 64 6f 77 | 6e 2e 20 54 68 65 73 65 | and dow|n. These|
|00005780| 20 66 69 6e 73 20 61 6c | 73 6f 20 68 65 6c 70 20 | fins al|so help |
|00005790| 63 6f 6d 6d 75 6e 69 63 | 61 74 65 20 74 68 65 20 |communic|ate the |
|000057a0| 6b 69 6e 64 20 6f 66 20 | 6d 6f 6f 64 20 61 20 73 |kind of |mood a s|
|000057b0| 68 61 72 6b 20 69 73 20 | 69 6e 2e 20 57 68 65 6e |hark is |in. When|
|000057c0| 20 74 68 65 20 70 65 63 | 74 6f 72 61 6c 20 66 69 | the pec|toral fi|
|000057d0| 6e 73 20 61 72 65 20 69 | 6e 20 74 68 65 20 64 6f |ns are i|n the do|
|000057e0| 77 6e 77 61 72 64 20 70 | 6f 73 69 74 69 6f 6e 2c |wnward p|osition,|
|000057f0| 20 74 68 65 20 73 68 61 | 72 6b 20 69 73 20 69 6e | the sha|rk is in|
|00005800| 20 77 68 61 74 20 73 63 | 69 65 6e 74 69 73 74 73 | what sc|ientists|
|00005810| 20 61 6e 64 20 64 69 76 | 65 72 73 20 63 61 6c 6c | and div|ers call|
|00005820| 20 61 20 22 74 68 72 65 | 61 74 22 20 70 6f 73 74 | a "thre|at" post|
|00005830| 75 72 65 2e 20 54 68 69 | 73 20 6d 65 61 6e 73 20 |ure. Thi|s means |
|00005840| 74 68 61 74 20 74 68 65 | 20 73 68 61 72 6b 20 6d |that the| shark m|
|00005850| 61 79 20 62 65 20 72 65 | 61 64 79 20 74 6f 20 61 |ay be re|ady to a|
|00005860| 74 74 61 63 6b 2e 20 44 | 69 76 65 72 73 20 68 61 |ttack. D|ivers ha|
|00005870| 76 65 20 6c 65 61 72 6e | 65 64 20 74 6f 20 61 76 |ve learn|ed to av|
|00005880| 6f 69 64 20 61 6e 64 20 | 63 61 72 65 66 75 6c 6c |oid and |carefull|
|00005890| 79 20 72 65 74 72 65 61 | 74 20 66 72 6f 6d 20 73 |y retrea|t from s|
|000058a0| 68 61 72 6b 73 20 77 69 | 74 68 20 74 68 65 69 72 |harks wi|th their|
|000058b0| 20 70 65 63 74 6f 72 61 | 6c 20 66 69 6e 73 20 69 | pectora|l fins i|
|000058c0| 6e 20 74 68 69 73 20 70 | 6f 73 69 74 69 6f 6e 2e |n this p|osition.|
|000058d0| 20 0a 3d 03 53 68 61 72 | 6b 20 47 69 6c 6c 73 0a | .=.Shar|k Gills.|
|000058e0| 0a 53 48 41 52 4b 20 47 | 49 4c 4c 53 20 0a 09 4c |.SHARK G|ILLS ..L|
|000058f0| 69 6b 65 20 6f 74 68 65 | 72 20 66 69 73 68 2c 20 |ike othe|r fish, |
|00005900| 73 68 61 72 6b 73 20 75 | 73 65 20 67 69 6c 6c 73 |sharks u|se gills|
|00005910| 20 74 6f 20 72 65 6d 6f | 76 65 20 74 68 65 20 6f | to remo|ve the o|
|00005920| 78 79 67 65 6e 20 74 68 | 65 79 20 6e 65 65 64 20 |xygen th|ey need |
|00005930| 66 72 6f 6d 20 74 68 65 | 20 77 61 74 65 72 2e 20 |from the| water. |
|00005940| 41 20 73 68 61 72 6b 27 | 73 20 67 69 6c 6c 73 20 |A shark'|s gills |
|00005950| 61 72 65 20 6d 61 64 65 | 20 75 70 20 6f 66 20 61 |are made| up of a|
|00005960| 20 66 65 61 74 68 65 72 | 79 20 6d 61 74 65 72 69 | feather|y materi|
|00005970| 61 6c 20 74 68 61 74 20 | 69 73 20 70 61 63 6b 65 |al that |is packe|
|00005980| 64 20 77 69 74 68 20 74 | 69 6e 79 20 62 6c 6f 6f |d with t|iny bloo|
|00005990| 64 20 76 65 73 73 65 6c | 73 2e 20 41 73 20 77 61 |d vessel|s. As wa|
|000059a0| 74 65 72 20 65 6e 74 65 | 72 73 20 74 68 65 20 73 |ter ente|rs the s|
|000059b0| 68 61 72 6b 27 73 20 6d | 6f 75 74 68 20 61 6e 64 |hark's m|outh and|
|000059c0| 20 70 61 73 73 65 73 20 | 6f 76 65 72 20 74 68 65 | passes |over the|
|000059d0| 20 67 69 6c 6c 73 2c 20 | 74 68 65 20 62 6c 6f 6f | gills, |the bloo|
|000059e0| 64 20 76 65 73 73 65 6c | 73 20 69 6e 20 74 68 65 |d vessel|s in the|
|000059f0| 20 67 69 6c 6c 73 20 61 | 62 73 6f 72 62 20 6f 78 | gills a|bsorb ox|
|00005a00| 79 67 65 6e 20 66 72 6f | 6d 20 74 68 65 20 77 61 |ygen fro|m the wa|
|00005a10| 74 65 72 20 61 6e 64 20 | 72 65 6c 65 61 73 65 20 |ter and |release |
|00005a20| 63 61 72 62 6f 6e 20 64 | 69 6f 78 69 64 65 2e 20 |carbon d|ioxide. |
|00005a30| 54 68 65 20 77 61 74 65 | 72 20 74 68 65 6e 20 65 |The wate|r then e|
|00005a40| 78 69 74 73 20 74 68 72 | 6f 75 67 68 20 61 20 73 |xits thr|ough a s|
|00005a50| 68 61 72 6b 27 73 20 67 | 69 6c 6c 20 73 6c 69 74 |hark's g|ill slit|
|00005a60| 73 2e 20 4d 6f 73 74 20 | 66 69 73 68 20 68 61 76 |s. Most |fish hav|
|00005a70| 65 20 6f 6e 6c 79 20 6f | 6e 65 20 67 69 6c 6c 20 |e only o|ne gill |
|00005a80| 73 6c 69 74 2c 20 62 75 | 74 20 73 68 61 72 6b 73 |slit, bu|t sharks|
|00005a90| 20 68 61 76 65 20 62 65 | 74 77 65 65 6e 20 66 69 | have be|tween fi|
|00005aa0| 76 65 20 61 6e 64 20 73 | 65 76 65 6e 2e 20 0a 09 |ve and s|even. ..|
|00005ab0| 54 6f 20 6b 65 65 70 20 | 62 72 65 61 74 68 69 6e |To keep |breathin|
|00005ac0| 67 20 6c 69 6b 65 20 74 | 68 69 73 2c 20 6d 6f 73 |g like t|his, mos|
|00005ad0| 74 20 73 68 61 72 6b 73 | 20 6d 75 73 74 20 6b 65 |t sharks| must ke|
|00005ae0| 65 70 20 6d 6f 76 69 6e | 67 20 66 6f 72 77 61 72 |ep movin|g forwar|
|00005af0| 64 20 73 6f 20 74 68 61 | 74 20 74 68 65 79 20 6d |d so tha|t they m|
|00005b00| 61 69 6e 74 61 69 6e 20 | 61 20 63 6f 6e 73 74 61 |aintain |a consta|
|00005b10| 6e 74 20 66 6c 6f 77 20 | 6f 66 20 77 61 74 65 72 |nt flow |of water|
|00005b20| 20 74 68 72 6f 75 67 68 | 20 74 68 65 69 72 20 6d | through| their m|
|00005b30| 6f 75 74 68 20 61 6e 64 | 20 6f 76 65 72 20 74 68 |outh and| over th|
|00005b40| 65 69 72 20 67 69 6c 6c | 73 2e 20 49 66 20 74 68 |eir gill|s. If th|
|00005b50| 65 73 65 20 73 68 61 72 | 6b 73 20 73 74 6f 70 20 |ese shar|ks stop |
|00005b60| 73 77 69 6d 6d 69 6e 67 | 20 66 6f 72 20 6c 6f 6e |swimming| for lon|
|00005b70| 67 20 70 65 72 69 6f 64 | 73 20 6f 66 20 74 69 6d |g period|s of tim|
|00005b80| 65 2c 20 74 68 65 79 20 | 77 69 6c 6c 20 73 75 66 |e, they |will suf|
|00005b90| 66 6f 63 61 74 65 2e 20 | 4f 74 68 65 72 20 73 68 |focate. |Other sh|
|00005ba0| 61 72 6b 73 2c 20 73 75 | 63 68 20 61 73 20 74 68 |arks, su|ch as th|
|00005bb0| 6f 73 65 20 74 68 61 74 | 20 6c 69 76 65 20 6f 6e |ose that| live on|
|00005bc0| 20 74 68 65 20 6f 63 65 | 61 6e 20 62 6f 74 74 6f | the oce|an botto|
|00005bd0| 6d 2c 20 68 61 76 65 20 | 6d 75 73 63 6c 65 73 20 |m, have |muscles |
|00005be0| 77 68 69 63 68 20 70 75 | 6d 70 20 77 61 74 65 72 |which pu|mp water|
|00005bf0| 20 72 68 79 74 68 6d 69 | 63 61 6c 6c 79 20 6f 76 | rhythmi|cally ov|
|00005c00| 65 72 20 74 68 65 69 72 | 20 67 69 6c 6c 73 20 61 |er their| gills a|
|00005c10| 74 20 61 6c 6c 20 74 69 | 6d 65 73 2e 20 0a ff 03 |t all ti|mes. ...|
|00005c20| 53 68 61 72 6b 20 4d 6f | 75 74 68 0a 0a 53 48 41 |Shark Mo|uth..SHA|
|00005c30| 52 4b 20 4d 4f 55 54 48 | 20 0a 09 41 20 73 68 61 |RK MOUTH| ..A sha|
|00005c40| 72 6b 27 73 20 6d 6f 75 | 74 68 20 69 73 20 70 65 |rk's mou|th is pe|
|00005c50| 72 66 65 63 74 6c 79 20 | 73 75 69 74 65 64 20 74 |rfectly |suited t|
|00005c60| 6f 20 61 20 6c 69 66 65 | 73 74 79 6c 65 20 6f 66 |o a life|style of|
|00005c70| 20 68 75 6e 74 69 6e 67 | 20 61 6e 64 20 65 61 74 | hunting| and eat|
|00005c80| 69 6e 67 2e 20 54 68 65 | 20 73 68 61 72 6b 27 73 |ing. The| shark's|
|00005c90| 20 68 65 61 64 20 61 6e | 64 20 6e 65 63 6b 20 61 | head an|d neck a|
|00005ca0| 72 65 20 63 6f 76 65 72 | 65 64 20 77 69 74 68 20 |re cover|ed with |
|00005cb0| 67 69 61 6e 74 20 6d 75 | 73 63 6c 65 73 20 74 68 |giant mu|scles th|
|00005cc0| 61 74 20 67 69 76 65 20 | 61 20 73 68 61 72 6b 20 |at give |a shark |
|00005cd0| 69 74 73 20 70 6f 77 65 | 72 66 75 6c 20 62 69 74 |its powe|rful bit|
|00005ce0| 65 2e 20 54 68 65 20 75 | 70 70 65 72 20 6a 61 77 |e. The u|pper jaw|
|00005cf0| 20 6f 66 20 6d 6f 73 74 | 20 73 68 61 72 6b 73 20 | of most| sharks |
|00005d00| 69 73 20 6f 6e 6c 79 20 | 6c 6f 6f 73 65 6c 79 20 |is only |loosely |
|00005d10| 63 6f 6e 6e 65 63 74 65 | 64 20 74 6f 20 74 68 65 |connecte|d to the|
|00005d20| 20 73 68 61 72 6b 27 73 | 20 73 6b 75 6c 6c 2e 20 | shark's| skull. |
|00005d30| 54 68 69 73 20 61 6c 6c | 6f 77 73 20 6d 61 6e 79 |This all|ows many|
|00005d40| 20 73 68 61 72 6b 73 20 | 74 6f 20 65 78 74 65 6e | sharks |to exten|
|00005d50| 64 20 74 68 65 69 72 20 | 75 70 70 65 72 20 6a 61 |d their |upper ja|
|00005d60| 77 20 6f 75 74 77 61 72 | 64 2c 20 74 68 65 72 65 |w outwar|d, there|
|00005d70| 62 79 20 6d 61 6b 69 6e | 67 20 69 74 20 65 61 73 |by makin|g it eas|
|00005d80| 69 65 72 20 74 6f 20 74 | 61 6b 65 20 6c 61 72 67 |ier to t|ake larg|
|00005d90| 65 20 62 69 74 65 73 20 | 6f 75 74 20 6f 66 20 74 |e bites |out of t|
|00005da0| 68 65 69 72 20 70 72 65 | 79 2e 20 41 20 73 68 61 |heir pre|y. A sha|
|00005db0| 72 6b 27 73 20 74 65 65 | 74 68 20 64 69 66 66 65 |rk's tee|th diffe|
|00005dc0| 72 20 69 6e 20 73 69 7a | 65 20 61 6e 64 20 73 68 |r in siz|e and sh|
|00005dd0| 61 70 65 20 64 65 70 65 | 6e 64 69 6e 67 20 6f 6e |ape depe|nding on|
|00005de0| 20 74 68 65 20 74 79 70 | 65 20 6f 66 20 73 68 61 | the typ|e of sha|
|00005df0| 72 6b 2e 20 54 68 65 20 | 62 75 6c 6c 20 73 68 61 |rk. The |bull sha|
|00005e00| 72 6b 2c 20 66 6f 72 20 | 69 6e 73 74 61 6e 63 65 |rk, for |instance|
|00005e10| 2c 20 68 61 73 20 73 6d | 61 6c 6c 20 74 65 65 74 |, has sm|all teet|
|00005e20| 68 20 77 68 69 63 68 20 | 61 72 65 20 67 6f 6f 64 |h which |are good|
|00005e30| 20 66 6f 72 20 63 68 65 | 77 69 6e 67 20 75 70 20 | for che|wing up |
|00005e40| 63 72 61 62 73 20 61 6e | 64 20 6d 6f 6c 6c 75 73 |crabs an|d mollus|
|00005e50| 6b 73 2e 20 54 68 65 20 | 67 72 65 61 74 20 77 68 |ks. The |great wh|
|00005e60| 69 74 65 20 73 68 61 72 | 6b 20 68 61 73 20 6c 61 |ite shar|k has la|
|00005e70| 72 67 65 2c 20 73 65 72 | 72 61 74 65 64 20 74 65 |rge, ser|rated te|
|00005e80| 65 74 68 20 74 68 61 74 | 20 63 61 6e 20 73 61 77 |eth that| can saw|
|00005e90| 20 6f 66 66 20 6c 61 72 | 67 65 20 70 69 65 63 65 | off lar|ge piece|
|00005ea0| 73 20 6f 66 20 66 6c 65 | 73 68 2e 20 0a 09 53 68 |s of fle|sh. ..Sh|
|00005eb0| 61 72 6b 20 74 65 65 74 | 68 20 61 72 65 20 6e 6f |ark teet|h are no|
|00005ec0| 74 20 61 74 74 61 63 68 | 65 64 20 64 69 72 65 63 |t attach|ed direc|
|00005ed0| 74 6c 79 20 74 6f 20 74 | 68 65 20 6a 61 77 20 6f |tly to t|he jaw o|
|00005ee0| 66 20 61 20 73 68 61 72 | 6b 2c 20 61 73 20 74 68 |f a shar|k, as th|
|00005ef0| 65 79 20 61 72 65 20 69 | 6e 20 6d 61 6e 79 20 61 |ey are i|n many a|
|00005f00| 6e 69 6d 61 6c 73 2e 20 | 49 6e 73 74 65 61 64 2c |nimals. |Instead,|
|00005f10| 20 74 68 65 20 74 65 65 | 74 68 20 67 72 6f 77 20 | the tee|th grow |
|00005f20| 69 6e 20 61 20 67 72 6f | 6f 76 65 20 6b 6e 6f 77 |in a gro|ove know|
|00005f30| 6e 20 61 73 20 61 20 22 | 74 6f 6f 74 68 20 62 65 |n as a "|tooth be|
|00005f40| 64 2c 22 20 77 68 65 72 | 65 20 74 68 65 79 20 6d |d," wher|e they m|
|00005f50| 6f 76 65 20 66 72 6f 6d | 20 74 68 65 20 62 61 63 |ove from| the bac|
|00005f60| 6b 20 74 6f 20 74 68 65 | 20 66 72 6f 6e 74 2e 20 |k to the| front. |
|00005f70| 57 68 65 6e 20 62 72 6f | 6b 65 6e 20 6f 72 20 6c |When bro|ken or l|
|00005f80| 6f 73 74 2c 20 61 20 62 | 72 61 6e 64 20 6e 65 77 |ost, a b|rand new|
|00005f90| 20 74 6f 6f 74 68 20 72 | 6f 74 61 74 65 73 20 75 | tooth r|otates u|
|00005fa0| 70 20 66 72 6f 6d 20 62 | 65 68 69 6e 64 20 69 6e |p from b|ehind in|
|00005fb0| 20 6a 75 73 74 20 61 20 | 66 65 77 20 64 61 79 73 | just a |few days|
|00005fc0| 20 72 65 70 6c 61 63 69 | 6e 67 20 74 68 65 20 6c | replaci|ng the l|
|00005fd0| 6f 73 74 20 6f 72 20 64 | 61 6d 61 67 65 64 20 74 |ost or d|amaged t|
|00005fe0| 6f 6f 74 68 2e 20 53 68 | 61 72 6b 73 20 68 61 76 |ooth. Sh|arks hav|
|00005ff0| 65 20 73 75 63 68 20 70 | 6f 77 65 72 66 75 6c 20 |e such p|owerful |
|00006000| 62 69 74 65 73 20 74 68 | 61 74 20 74 68 65 79 20 |bites th|at they |
|00006010| 6f 66 74 65 6e 20 62 72 | 65 61 6b 20 6f 72 20 6c |often br|eak or l|
|00006020| 6f 73 65 20 74 65 65 74 | 68 2e 20 0a 23 04 53 68 |ose teet|h. .#.Sh|
|00006030| 61 72 6b 20 53 6b 69 6e | 0a 0a 53 48 41 52 4b 20 |ark Skin|..SHARK |
|00006040| 53 4b 49 4e 20 0a 09 41 | 20 73 68 61 72 6b 27 73 |SKIN ..A| shark's|
|00006050| 20 73 6b 69 6e 20 6c 6f | 6f 6b 73 20 73 6d 6f 6f | skin lo|oks smoo|
|00006060| 74 68 20 62 75 74 20 69 | 73 20 69 6e 20 66 61 63 |th but i|s in fac|
|00006070| 74 20 76 65 72 79 20 72 | 6f 75 67 68 2c 20 6c 69 |t very r|ough, li|
|00006080| 6b 65 20 73 61 6e 64 70 | 61 70 65 72 2e 20 54 68 |ke sandp|aper. Th|
|00006090| 61 74 27 73 20 62 65 63 | 61 75 73 65 20 74 68 65 |at's bec|ause the|
|000060a0| 20 73 6b 69 6e 20 69 73 | 20 63 6f 76 65 72 65 64 | skin is| covered|
|000060b0| 20 77 69 74 68 20 73 6d | 61 6c 6c 2c 20 74 6f 6f | with sm|all, too|
|000060c0| 74 68 2d 6c 69 6b 65 20 | 62 75 6d 70 73 20 63 61 |th-like |bumps ca|
|000060d0| 6c 6c 65 64 20 22 64 65 | 6e 74 69 63 6c 65 73 2e |lled "de|nticles.|
|000060e0| 22 20 54 68 65 73 65 20 | 62 75 6d 70 73 20 66 65 |" These |bumps fe|
|000060f0| 65 6c 20 73 6d 6f 6f 74 | 68 20 77 68 65 6e 20 74 |el smoot|h when t|
|00006100| 68 65 79 20 61 72 65 20 | 73 74 72 6f 6b 65 64 20 |hey are |stroked |
|00006110| 66 72 6f 6d 20 66 72 6f | 6e 74 20 74 6f 20 62 61 |from fro|nt to ba|
|00006120| 63 6b 2c 20 62 75 74 20 | 66 65 65 6c 20 76 65 72 |ck, but |feel ver|
|00006130| 79 20 70 72 69 63 6b 6c | 79 20 77 68 65 6e 20 73 |y prickl|y when s|
|00006140| 74 72 6f 6b 65 64 20 69 | 6e 20 74 68 65 20 72 65 |troked i|n the re|
|00006150| 76 65 72 73 65 20 64 69 | 72 65 63 74 69 6f 6e 2e |verse di|rection.|
|00006160| 20 53 6f 6d 65 20 70 65 | 6f 70 6c 65 20 74 68 69 | Some pe|ople thi|
|00006170| 6e 6b 20 74 68 61 74 20 | 74 68 65 73 65 20 62 75 |nk that |these bu|
|00006180| 6d 70 73 20 73 6c 6f 77 | 20 61 20 73 68 61 72 6b |mps slow| a shark|
|00006190| 20 64 6f 77 6e 20 62 79 | 20 63 72 65 61 74 69 6e | down by| creatin|
|000061a0| 67 20 66 72 69 63 74 69 | 6f 6e 20 77 69 74 68 20 |g fricti|on with |
|000061b0| 74 68 65 20 77 61 74 65 | 72 2e 20 41 63 74 75 61 |the wate|r. Actua|
|000061c0| 6c 6c 79 2c 20 74 68 65 | 20 6f 63 65 61 6e 20 77 |lly, the| ocean w|
|000061d0| 61 74 65 72 20 66 6c 6f | 77 73 20 74 68 72 6f 75 |ater flo|ws throu|
|000061e0| 67 68 20 63 68 61 6e 6e | 65 6c 73 20 62 65 74 77 |gh chann|els betw|
|000061f0| 65 65 6e 20 74 68 65 20 | 62 75 6d 70 73 20 69 6e |een the |bumps in|
|00006200| 20 73 75 63 68 20 61 20 | 77 61 79 20 74 68 61 74 | such a |way that|
|00006210| 20 74 68 65 79 20 72 65 | 64 75 63 65 20 66 72 69 | they re|duce fri|
|00006220| 63 74 69 6f 6e 2c 20 68 | 65 6c 70 69 6e 67 20 74 |ction, h|elping t|
|00006230| 68 65 20 73 68 61 72 6b | 20 74 6f 20 73 77 69 6d |he shark| to swim|
|00006240| 20 6d 6f 72 65 20 65 66 | 66 69 63 69 65 6e 74 6c | more ef|ficientl|
|00006250| 79 2e 20 55 6e 66 6f 72 | 74 75 6e 61 74 65 6c 79 |y. Unfor|tunately|
|00006260| 2c 20 6d 61 6e 79 20 64 | 69 76 65 72 73 20 68 61 |, many d|ivers ha|
|00006270| 76 65 20 67 6f 74 74 65 | 6e 20 76 65 72 79 20 62 |ve gotte|n very b|
|00006280| 61 64 20 73 63 72 61 70 | 65 73 20 66 72 6f 6d 20 |ad scrap|es from |
|00006290| 61 20 70 61 73 73 69 6e | 67 20 73 68 61 72 6b 20 |a passin|g shark |
|000062a0| 77 68 6f 73 65 20 73 6b | 69 6e 20 72 75 62 62 65 |whose sk|in rubbe|
|000062b0| 64 20 74 68 65 6d 20 74 | 68 65 20 77 72 6f 6e 67 |d them t|he wrong|
|000062c0| 20 77 61 79 2e 20 42 65 | 66 6f 72 65 20 74 68 65 | way. Be|fore the|
|000062d0| 20 69 6e 76 65 6e 74 69 | 6f 6e 20 6f 66 20 73 61 | inventi|on of sa|
|000062e0| 6e 64 70 61 70 65 72 2c | 20 73 68 61 72 6b 20 73 |ndpaper,| shark s|
|000062f0| 6b 69 6e 20 77 61 73 20 | 77 69 64 65 6c 79 20 75 |kin was |widely u|
|00006300| 73 65 64 20 66 6f 72 20 | 61 6e 20 61 62 72 61 73 |sed for |an abras|
|00006310| 69 76 65 20 61 6e 64 20 | 66 6f 72 20 70 6f 6c 69 |ive and |for poli|
|00006320| 73 68 69 6e 67 2e 20 0a | 09 52 75 6e 6e 69 6e 67 |shing. .|.Running|
|00006330| 20 74 68 65 20 6c 65 6e | 67 74 68 20 6f 66 20 61 | the len|gth of a|
|00006340| 20 73 68 61 72 6b 27 73 | 20 62 6f 64 79 20 69 73 | shark's| body is|
|00006350| 20 61 20 72 6f 77 20 6f | 66 20 73 6d 61 6c 6c 20 | a row o|f small |
|00006360| 72 65 63 65 70 74 6f 72 | 73 20 63 61 6c 6c 65 64 |receptor|s called|
|00006370| 20 74 68 65 20 22 6c 61 | 74 65 72 61 6c 20 6c 69 | the "la|teral li|
|00006380| 6e 65 20 63 61 6e 61 6c | 2e 22 20 54 68 69 73 20 |ne canal|." This |
|00006390| 63 61 6e 61 6c 20 69 73 | 20 6d 61 64 65 20 75 70 |canal is| made up|
|000063a0| 20 6f 66 20 74 69 6e 79 | 20 73 65 6e 73 6f 72 73 | of tiny| sensors|
|000063b0| 20 74 68 61 74 20 64 65 | 74 65 63 74 20 73 6d 61 | that de|tect sma|
|000063c0| 6c 6c 20 63 68 61 6e 67 | 65 73 20 69 6e 20 74 68 |ll chang|es in th|
|000063d0| 65 20 77 61 74 65 72 20 | 70 72 65 73 73 75 72 65 |e water |pressure|
|000063e0| 20 6e 65 61 72 62 79 2e | 20 57 69 74 68 6f 75 74 | nearby.| Without|
|000063f0| 20 73 65 65 69 6e 67 20 | 6f 72 20 73 6d 65 6c 6c | seeing |or smell|
+--------+-------------------------+-------------------------+--------+--------+
Only 25.0 KB of data is shown above.