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脐带是连于胚胎与胎盘间的条索状结构。脐带外被羊膜内含体蒂分化的黏液性结缔组织。结缔组织内除含有闭锁的卵黄囊蒂和尿囊外,还有脐动脉和脐静脉,妊娠期脐带是胎儿从母体获得营养和排泄物的重要途径,尽管脐带的组织结构简单,却是联系胎儿和胎盘的纽带,脐带因素一直是导致分娩
Umbilical cord is connected to the cord between the embryo and placenta structure. Umbilical cord amniotic endometrial peduncle differentiation of mucinous connective tissue. In addition to connective tissue containing the yolk sac and the allantoic atresia, as well as umbilical artery and umbilical vein, umbilical cord during pregnancy is the fetus from the maternal access to nutrition and excretion of the important ways, although the organizational structure of the umbilical cord is simple, it is associated with the fetus And the placental bond, umbilical cord has always been the cause of childbirth