sphincter
US /ˈsfɪŋk.tɚ/
UK /ˈsfɪŋk.tər/
名词
括约肌
a ring of muscle surrounding and serving to guard or close an opening or tube in the body, such as the anus or the opening of the stomach into the duodenum.
示例:
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The esophageal sphincter prevents stomach acid from flowing back into the esophagus.
食道括约肌防止胃酸倒流回食道。
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Damage to the anal sphincter can lead to incontinence.
肛门括约肌损伤可导致失禁。