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What is a sphincter?


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The sphincter is a circular band of voluntary or involuntary muscle that encircles an orifice of the body.

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A sphincter (noun) means a ring of muscle that contracts to close an opening. Synonyms are anatomical sphincter, sphincter muscle. ChaCha!

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It is something in the anus!

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The internal and external anal sphincters are rings of muscle at the opening of the anus. The sphincters keeps the anus closed as fecal matter collects in the rectum. Thanks for asking ChaCha!

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A Sphincter is an annular muscle surrounding and able to contract or close a bodily opening. Thanks!

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A sphincter is a ring-shaped muscle that relaxes or tightens to open or close a passage or opening in the body. Cha cha!

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A muscular ring that closes a bodily opening

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A sphincter is an annular muscle surrounding and able to contract or close a bodily opening. Thanks for using ChaCha!

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