xiaohuadao（digestive tract）shicongkouqiangzhigangmendelianxuxingguandao,yicifenweikouqiang,yan,shiguan,wei,xiaochanghedachang.xiaohuaguanbi(chukouqiangheyanwai)youneixiangwaifenweizhanmo,zhanmoxiaceng,jicengjiwaimosiceng.qizhongzhanmoyoushangpi,guyoucenghezhanmojicengzucheng,shixiaohuaguangeduanjiegouchayizuida,gongnengzuizhongyaodebufen,zhanmojicengshixiaohuaguanbisuoteyoudejiegou.
