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骨盆底解剖学特征正确的是()

发布日期:2022-07-12

骨盆底解剖学特征正确的是()
A

外层为盆膈

B

中层为泌尿生殖膈

C

肛门外括约肌属盆膈范畴

D

球海绵体肌有松弛阴道的作用

E

肛提肌是组成骨盆底较大的肌肉

试题解析

肛门外括约肌

肛门外括约肌 sphincter ani externus是由环绕在肛门内括约肌周围的骨骼肌(又称横纹肌)构成,有较强的控制排便功能。肛门外括约肌按其纤维所在部位,可分为3部。1、皮下部:位于肛门两侧皮下,椭圆形,其前后端均有少量肌束附着于会阴中心腱和肛尾韧带。2、浅部:位于皮下部深面,后端起于肛尾韧带,向前环绕肛门内括约肌下部,前端附着于会阴中心腱。3、深部:位于浅部深面,是较厚的环绕于肛门内括约肌上部的肌束。

中文名
肛门外括约肌
别名
横纹肌
外文名
sphincter ani externus
类型
骨骼肌

泌尿生殖膈

泌尿生殖膈(urogenital diaphragm)是1997年经全国科学技术名词审定委员会审定发布的医学名词 。

中文名
泌尿生殖膈
所属学科
医学
外文名
urogenital diaphragm
发布时间
1997年

盆膈

骨盆的后底。由肛提肌、尾骨肌和内、外筋膜构成,封闭骨盆后口的大部分。家畜虽不很发达,但腹内压增大时仍有固定盆腔器官的重要作用,如功能失常可引起直肠脱或阴道、子宫脱。盆膈与荐结节阔韧带和坐骨结节之间,形成锥体形坐骨直肠窝,尖在尾骨肌起始于坐骨棘处,底在肛门两侧的皮肤和浅筋膜下;年轻和营养良好的个体,窝内填充有脂肪。

中文名
盆膈
又称
盆底
耻管
直肠
外文名
pelvic diaphragm
肛提
肌扁而薄

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重庆住院医师

重庆住院医师妇产科

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