External anal sphincter
System
Muscular
SNOMED CT
244969008
External anal sphincter
Definition
The Sphincter ani externus (external anal sphincter) is a flat plane of muscular fibers, elliptical in shape and intimately adherent to the integument surrounding the margin of the anus. [WP,unvetted].
Also known as external sphincter ani, musculus sphincter ani externus — per UBERON
The External anal sphincter is a part of the Muscular.