图1-48 肛门括约肌
妇产科学

        1肛门外括约肌externalanalsphincter2深部deeppart3浅层superficialpart4皮下层subcutaneouspart5内痔internalhemorrhoid6肛门内括约肌internalanalsphincter[临床解剖学要点]肛门括约肌包括内括约肌和外括约肌。肛门内括约肌是直肠环形肌层的增厚部分,属不    （共 397 字）     [阅读本文] >>