anal sphincter
Noun
-
The sphincter muscle of the anus (synset 105579344)
is a type of: anatomical sphincter, sphincter, sphincter muscle - a ring of muscle that contracts to close an openinghas:
- musculus sphincter ani externus - an external ring of striated muscle surrounding the anus
- musculus sphincter ani internus - an internal ring of smooth muscle formed by circular fibers of the rectum
is a part of: anus - the excretory opening at the end of the alimentary canalsame as: musculus sphincter ani, sphincter ani
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