anatomical sphincter

• Кольцевая мышца в теле, которая может сокращаться, закрывая естественное отверстие или проход, например, анус или привратник желудка.

A ring-shaped muscle in the body that can contract to close a natural opening or passage, such as the anus or the pylorus of the stomach.

1. Ring of muscleC1formal

   A ring-like muscle that normally maintains constriction of a body passage or orifice and relaxes as required by normal physiological functioning.

   Кольцевая мышца

   • The lower esophageal sphincter prevents stomach acid from flowing back into the esophagus.
   • The pyloric sphincter controls the passage of food from the stomach to the small intestine.
   • The anal sphincter helps maintain continence.