括かつ約やく筋きん

noun

sphincter; constrictor muscle

Anatomical term for a ring-like muscle that closes a bodily passage or opening. Often used in compound names such as 肛門括約筋 (anal sphincter).

• 肛こう門もん括かつ約やく筋きんは排はい便べんのコントロールに重じゅう要ようです。

  The anal sphincter is important for controlling bowel movements.

• 食しょく道どうと胃いの間あいだには下か部ぶ食しょく道どう括かつ約やく筋きんがあります。

  There is a lower esophageal sphincter between the esophagus and the stomach.