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]. [ http://en.wikipedia.org/wiki/Sphincter_ani_externus_muscle ]
Synonyms: external sphincter ani musculus sphincter ani externus
Term information
- NCIT:C32548
- MA:0001531
- Wikipedia:Sphincter_ani_externus_muscle
- SCTID:244969008
- EMAPA:18265
- UMLS:C0224395 (ncithesaurus:External_Anal_Sphincter)
- FMA:21930
uberon_slim, pheno_slim, human_reference_atlas
Some literature reports don't consider the external anal sphincter to be a true sphincter muscle.