urethral sphincter
plural of tracing paper
plural of iambelegus
(anatomy) The collective muscles used to control the flow of urine from the urinary bladder. These muscles surround the urethra, so that when they contract, the urethra is closed.
An extremely large tanker ship.
外科医は修復後に正常に機能するように、尿道括約筋を慎重に調べた。
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