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众所周知,子宫颈阴道部为鳞状上皮所披盖,面子宫颈的粘膜却为圆柱状上皮所披盖。鳞状上皮与圆柱状上皮的分界是在子宫的外口。子宫颈管的粘膜以鲜红色与子宫颈阴道部灰白微红色有所不同。当子宫颈在不发生病理性变化的一般条件下,不能窥见子宫颈管的粘膜。在子宫内发育到第6—7个月的胎儿,其圆柱状上皮与鳞状上皮的分界,位于子宫颈管的内口,即显著地高于子宫颈管的外口,随着子宫内胎儿的进一步发育,子宫颈的上皮开始向子宫外口扩展,排挤掉所扩展部
As is known to all, the vaginal part of the cervix is covered by squamous epithelium and the mucosa of the cervix is covered by a cylindrical epithelium. The boundary between squamous epithelium and cylindrical epithelium is outside the uterus. Cervical mucosa in bright red and vaginal gray reddish red slightly different. When the cervix in the absence of pathological changes under the general conditions, can not see the cervical mucosa. Fetal development in the uterus to 6-7 months, the cylindrical epithelium and squamous demarcation line, located in the mouth of the cervix, that is significantly higher than the outer mouth of the cervix, with the fetus Of the further development of the cervix began to expand the uterus to the mouth, out of the expansion of the Department