Transcription: The heart is a muscular organ that pumps blood to all parts of the body. It can be divided into two cavities. Two pumps work simultaneously. The right cavity takes in oxygen-poor blood from the body and pumps it to the lungs. The left cavity takes oxygen-rich blood from the lungs and returns it to the body. Each side of the heart has an auricle, which draws blood in from the veins, and a ventricle which pushes the blood out through the arteries. There are two stages in each heartbeat cycle, the systole and the diastole. In diastole, the heart muscle relaxes and blood is drawn into the two auri ...
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