海量資源,盡在掌握
 1直腸壺腹ampullaofrectum2肛門anus[臨床解剖學(xué)要點(diǎn)]直腸長(zhǎng)10~14cm,在第3骶椎前方起自乙狀結(jié)腸,沿骶、尾骨前面下行,穿盆膈移行為肛管。全長(zhǎng)有骶曲和會(huì)陰曲,前者凸向后,后者凸向前。直腸中部管腔膨大稱直腸壺腹。肛管長(zhǎng)3~4cm,上接直 (共 249 字) [閱讀本文] >>