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

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.
external ontology notes
  • FMA class is not a subtype of muscle
has exact synonym
  • sphincter
has related synonym
  • circular muscle
id
  • UBERON:0004590

Term relations

Subclass of: