Circular muscular layer of rectum
Stratum musculare circulare recti
- Latin synonym: Stratum circulare tunicae muscularis recti
- Synonym: Circular layer of muscular coat of rectum
- Related terms: Circular layer
Definition
The circular layer (circular fibers) form a thin layer over the cecum and colon, being especially accumulated in the intervals between the sacculi; in the rectum they form a thick layer, and in the anal canal they become numerous, and constitute the Sphincter ani internus.