It is a ring of muscle fibers at the opening of the rectum, controlling the opening and closing of the anus.
Reference:
• American Medical Association Definitions of Medical Terms – https://www.ama-assn.org/
It is a ring of muscle fibers at the opening of the rectum, controlling the opening and closing of the anus.
Reference:
• American Medical Association Definitions of Medical Terms – https://www.ama-assn.org/
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