internal anal sphincter
circular layer of anal muscularis externa
The smooth muscle ring, formed by an increase of the circular muscle fibers of the rectum, situated at the upper end of the anal canal, internal to the outer voluntary external anal sphincter.
| Type | Muscle |
| Latin Name | circular layer of anal muscularis externa |
| FMA ID | 15710 |
Frequently Asked Questions
What is the internal anal sphincter?
The smooth muscle ring, formed by an increase of the circular muscle fibers of the rectum, situated at the upper end of the anal canal, internal to the outer voluntary external anal sphincter.
What is the Latin name for the internal anal sphincter?
The Latin name for the internal anal sphincter is circular layer of anal muscularis externa.
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