1直腸壺腹rectalampulla2肛柱rectalcolumn3肛竇analsinus4肛瓣analvalves5直腸橫襞transversefoldsofrectum6肛提肌levatoranim.7齒狀線dentateline8肛門(mén)內(nèi)括約肌internalanalsphincter9肛門(mén)外括約肌externalanalsphincter (共 173 字) [閱讀本文] >>
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 1直腸壺腹rectalampulla2肛柱rectalcolumn3肛竇analsinus4肛瓣analvalves5直腸橫襞transversefoldsofrectum6肛提肌levatoranim.7齒狀線dentateline8肛門(mén)內(nèi)括約肌internalanalsphincter9肛門(mén)外括約肌externalanalsphincter (共 173 字) [閱讀本文] >>