A structure, usually a circular muscle, that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning. [ http://en.wikipedia.org/wiki/Sphincter ]
This is just here as a test because I lose it
Term information
database cross reference
- null:http://en.wikipedia.org/wiki/Sphincter
- FMA:75004
- null:http://linkedlifedata.com/resource/umls/id/C1409894
- NCIT:C28381
- UMLS:C1409894 (ncithesaurus:Sphincter)
definition
A structure, usually a circular muscle, that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning.