The lower part gradually thinned to .±. mm and there were mesenter with length of .9±0.7 cm tightly connecting with rectal muscle, as well its end was joined with levator ani by tight connective tissue.
The lower part gradually thinned to .±. mm and there were mesenter with length of .9±0.7 cm tightly connecting with rectal muscle, as well its end was joined with levator ani by tight connective tissue.
下段逐渐变薄至 ( .± . )mm ,并有 ( . 9± 0 .7)cm长的系膜与直肠肌层连结紧密 ,末端借致密结缔组织与肛提肌相连。