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sphincter    
n. 括约肌

括约肌

sphincter
n 1: a ring of muscle that contracts to close an opening [synonym:
{sphincter}, {anatomical sphincter}, {sphincter muscle}]

Sphincter \Sphinc"ter\, n. [NL., fr. ??? to bind tight.] (Anat.)
A muscle which surrounds, and by its contraction tends to
close, a natural opening; as, the sphincter of the bladder.
[1913 Webster]


Sphincter \Sphinc"ter\, a. (Anat.)
Of, pertaining to, or designating, a sphincter; as, a
sphincter muscle.
[1913 Webster]


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  • Sphincters: What They Are, Locations Function
    Sphincters are circular-shaped muscles that open and close to control the flow of food, air, bile, pee and poop through your body When a sphincter is relaxed, a substance can easily flow through it But when it’s contracted or tightened, nothing can flow through it because it’s closed
  • Types and Function of Sphincters in the Body - Verywell Health
    Sphincters are muscles that control the flow of substances in the body There are over 60 types of sphincters found throughout the digestive tract, urinary tract, blood vessels, and eyes The internal and external anal sphincters control the process of defecation
  • Sphincters: Functions, Weakness Treatment
    The internal anal sphincter is involuntary, while the external anal sphincter is under voluntary control Together, they maintain continence and allow for controlled defecation
  • Pyloric Sphincter: Function, Location, Disorders
    Your pyloric sphincter is a tiny muscle that separates your stomach from your small intestine It controls when and how much of your partially digested food passes through
  • The Lower Esophageal Sphincter and Its Role in GERD
    The lower esophageal sphincter (LES) is a muscular valve that keeps stomach acid and food from moving back (refluxing) into your esophagus and throat Failure of the LES can lead to acid reflux and GERD, which may require treatments ranging from over-the-counter antacids to surgery
  • SPHINCTER Definition Meaning - Merriam-Webster
    The meaning of SPHINCTER is an annular muscle surrounding and able to contract or close a bodily opening
  • Urethral sphincters - Wikipedia
    The two muscles are either the male or female external urethral sphincter and the internal urethral sphincter When either of these muscles contracts, the urethra is sealed shut





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