对肛门括约功能起着主要作用的肌肉是：A．内括约肌B．外括约肌皮下环C．外括约肌浅环D．外括约肌深环E．以上均是

作者: rantiku 人气: - 评论: 0

问题对肛门括约功能起着主要作用的肌肉是：

选项 A．内括约肌 B．外括约肌皮下环 C．外括约肌浅环 D．外括约肌深环 E．以上均是

答案 D

解析

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