The puborectal muscle is not a single muscle ansa, and the tractive functions of different parts of the muscle act on the anal canal, which is related to the formation and maintenance of anterior and posterior horns of the anal canal.
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美
- 恥骨直腸肌并非單一肌袢 ,其會(huì )陰體部、肌袢部及聯(lián)合縱肌部共同牽拉作用于肛管 ,分別與肛管直腸前、后角的形成和維持有關(guān)。
