anal sphincter

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Thân thiện
Definition
  1. Noun:
    • The ring of muscle that controls the opening and closing of the anus: The anal sphincter is a circular muscle that contracts to close and relaxes to open the anal canal, allowing for the controlled release of feces.
Examples of Usage
  • Noun:
    • Damage to the anal sphincter can sometimes occur during childbirth.
    • The surgeon repaired the patient's torn anal sphincter.
    • Control of the anal sphincter is an important developmental milestone for toddlers.
Advanced Usage
  • "Internal anal sphincter": Refers to the involuntary, smooth muscle portion of the sphincter.
    • The internal anal sphincter is under autonomic nervous system control.
  • "External anal sphincter": Refers to the voluntary, skeletal muscle portion that allows for conscious control.
    • Physical therapy can help strengthen the external anal sphincter.
Variants and Related Words
  • Sphincter ani (n): The formal Latin-derived term for the anal sphincter.
  • Anus (n): The external opening at the end of the digestive tract, which is controlled by the anal sphincter.
Synonyms
  • Anal muscle: A less specific, descriptive synonym.
  • Rectal sphincter: A term sometimes used, though "anal sphincter" is more precise.
Related Phrases
  • Sphincter control: The ability to voluntarily regulate the anal sphincter.
    • The patient is working to regain sphincter control after the surgery.
  • Sphincter injury: Damage to the anal sphincter muscle.
    • A sphincter injury can lead to fecal incontinence.
Noun
  1. the sphincter muscle of the anus

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