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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: Functions, Weakness Treatment - Medicover Hospitals
    Sphincters are circular muscles that act as gatekeepers in the body They open and close to regulate the passage of food, liquids, and waste through various parts of the digestive tract The primary sphincters involved in digestion include the lower esophageal sphincter, the pyloric sphincter, the ileocecal valve, and the anal sphincter
  • SPHINCTER Definition Meaning - Merriam-Webster
    The meaning of SPHINCTER is an annular muscle surrounding and able to contract or close a bodily opening
  • Sphincter muscle | Esophageal, Gastrointestinal Urogenital | Britannica
    Sphincter muscle, any of the ringlike muscles surrounding and able to contract or close a bodily passage or opening One of the most important human sphincter muscles is the sphincter pylori, a thickening of the middle layer of stomach muscle around the pylorus (opening into the small intestine)
  • Sphincter - Simple English Wikipedia, the free encyclopedia
    The sphincter (often spelled sphincter) is a type of circular muscle that can constrict (tighten) or relax to control the passage of substances through bodily openings or ducts They play a crucial role in regulating the movement of food, liquids, and waste in various systems within the body, primarily the digestive and urinary systems
  • Sphincter - Health Encyclopedia
    A sphincter is a circular muscle that regulates the passage of substances through a bodily orifice or opening Sphincter s play a crucial role in various physiological processes, such as digestion, urination, and defecation
  • The esophageal sphincter: What to know - Medical News Today
    The esophageal sphincters are bands of muscles at the top and bottom of the esophagus — the muscular tube that passes food and drink from the mouth to the stomach Esophageal sphincters open
  • Sphincters of the Digestive System: Guardians of Digestive Flow
    Sphincters are located at various critical junctures within the digestive system, controlling the entry and exit of food material as it moves through different stages of digestion These specialized muscles prevent backflow and regulate the timing of digestive processes





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