Sphincter
Circular muscle that normally maintains constriction of a natural body passage or orifice / From Wikipedia, the free encyclopedia
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A sphincter is a circular muscle that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning. Sphincters are found in many animals. There are over 60 types in the human body,[citation needed] some microscopically small, in particular the millions of precapillary sphincters.[1] Sphincters relax at death, often releasing fluids and faeces.[2]
Quick Facts Identifiers, TA98 ...
Sphincter | |
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Identifiers | |
TA98 | A04.0.00.028 |
TA2 | 1992 |
FMA | 75004 |
Anatomical terms of muscle |
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