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Audio Interchange File Format  |  1996-12-09  |  319.7 KB  |  1 channel  |  11,025 sample rate  |  14 seconds
Transcription: Sphincter, a circular muscle that tightens around an organ or cavity to close it and to regulate the flow of material. If the sphincter around the rectum and the mouth of the bladder aren't functioning properly, for example, urine and stool might be lost involuntarily.