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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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  • SPHINCTER Definition Meaning - Merriam-Webster
    The meaning of SPHINCTER is an annular muscle surrounding and able to contract or close a bodily opening
  • 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 - 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
  • External and Internal Anal Sphincter Innervation: Pudendal . . .
    Introduction — Why Innervation Matters Beyond Textbook Diagrams Anal continence depends on two distinct rings of muscle: the external anal sphincter (EAS) under voluntary control and the internal anal sphincter (IAS) governed by autonomic reflexes Injury, entrapment, or iatrogenic transection of their nerve supplies is a leading, yet often preventable, cause of fecal incontinence
  • 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
  • SPHINCTER | English meaning - Cambridge Dictionary
    SPHINCTER definition: 1 a muscle that surrounds an opening in the body and can tighten to close it: 2 a muscle that… Learn more
  • External Anal Sphincter: Location, Innervation, Function . . .
    What is the External Anal Sphincter The external anal sphincter is a ring of skeletal muscle that surrounds the lower end of the anal canal Along with the internal anal sphincter, it forms the sphincter ani muscle complex responsible for controlling defecation The muscle also belongs to the anal triangle of the perineum





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