umbillical circulation 脐循环

umbillical stalk 脐带

umbillical cord 脐带

umbillical constriction 脐缢

umbillical vein 脐静脉

umbillical vesicle 脐囊

umbillical artery 脐动脉

umbillical cicartix 脐带瘢

mian support umbillical 生命维持主脐带