Sphincter

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Sphincter Meaning and Definition in Dictionary

Definitions from Wordnet 2.0


  • a ring of muscle that contracts to close an opening

Definitions from Wiktionary


  • a ring of muscle that contracts to close an opening

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Wikipedia Meaning and Definition on 'Sphincter'


  • Sphincter: A sphincter is a circular muscle that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological
  • Sphincter of Oddi: The sphincter of Oddi (also hepatopancreatic sphincter or Glisson's sphincter), abbreviated as SO, is a muscular valve that controls the flow of digestive
  • Urethral sphincters: urethral sphincter and the internal urethral sphincter. When either of these muscles contracts, the urethra is sealed shut. The external urethral sphincter originates
  • Sphincter of Oddi dysfunction: Oddi: functional biliary sphincter of Oddi and functional pancreatic sphincter of Oddi disorder. The sphincter of Oddi is a sphincter muscle, a circular band
  • Internal anal sphincter: The internal anal sphincter, IAS, (or sphincter ani internus) is a muscular ring that surrounds about 2.5–4.0 cm of the anal canal; its inferior border
  • External anal sphincter: The external anal sphincter (or sphincter ani externus ) is a flat plane of muscular fibers, elliptical in shape and intimately adherent to the skin surrounding
  • Precapillary sphincter: A precapillary sphincter is a band of smooth muscle that adjusts blood flow into capillaries mainly in the mesenteric microcirculation. At the point where
  • External sphincter muscle: External sphincter muscle may refer to: External anal sphincter External sphincter muscle of female urethra External sphincter muscle of male urethra
  • Anal sphincter muscles: Anal sphincter muscles may refer to: External anal sphincter Internal anal sphincter
  • External sphincter muscle of urethra: External sphincter muscle of urethra can refer to: external sphincter muscle of male urethra external sphincter muscle of female urethra

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