chorionic villi olk sac amnionic fluid in amniotic cavity allantois umbilica cord chorion amnion cavity of uterus
00
胎量半果叶状毛底限 /Placenta Chorionic Fetal arte Maternal Fetal vein arte y Maternal Umbilical arteries Umbilical cord Uterus Umbilical vein Amniotic cavit Umbilical Fetal portion Maternal portion Endometrium of placenta of placenta
意彩成 Uterine vessels Uterine glands Syncytiotrophoblast Cytotrophoblast Mesoderm Intervillous space
二级绒毛 Uterine vessels Uterine glands Syncytiotrophoblast Cytotrophoblast Core of mesoderm with fetal vessels Mesoderm Intervillous space