external anal sphincter
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 info
- Wikipedia:Sphincter_ani_externus_muscle
- FMA:21930
- EMAPA:18265
- UMLS:C0224395 (ncithesaurus:External_Anal_Sphincter)
- MA:0001531
- NCIT:C32548
- SCTID:244969008
uberon_slim, pheno_slim, human_reference_atlas
Some literature reports don't consider the external anal sphincter to be a true sphincter muscle.
http://upload.wikimedia.org/wikipedia/commons/7/75/Anorectum.gif
sphincter ani externus
uberon
UBERON:0001367
External anal sphincter
http://purl.obolibrary.org/obo/NCBITaxon_9606
https://github.com/obophenotype/uberon/issues/2344