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Sphincter (Noun)

Meaning

A ring of muscle that contracts to close an opening.

Classification

Nouns denoting body parts.

Examples

  • The anal sphincter is a ring of muscle that helps control bowel movements by contracting to close the anus.
  • The muscles in the iris form a sphincter that contracts to constrict the pupil in bright light.
  • The urethral sphincter is a ring of muscle that contracts to close the urethra and prevent urine from flowing out.
  • The pyloric sphincter is a muscular ring that contracts to close the opening between the stomach and small intestine.
  • The orbicularis oculi muscle forms a sphincter around the eye that contracts to close the eyelid.

Synonyms

  • Sphincter Muscle
  • Anatomical Sphincter

Hypernyms

  • Musculus

Hyponyms

  • Musculus Sphincter Vesicae
  • Pyloric Valve
  • Musculus Sphincter Urethrae
  • Musculus Sphincter Pupillae
  • Musculus Sphincter Pylori
  • Sphincter Ani
  • Musculus Sphincter Ani
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