Fetal membranes, Placenta and Twinning Eow Or 3-eed-cad Jun zhou(周俊) School of medicine, ZheJiang University 20190611
Fetal Membranes, Placenta and Twinning Jun Zhou (周俊） School of Medicine, ZheJiang University 20190611
OBJECTIVES 1. The components of fetal membrane and their functions 2. Structure and function of placenta 3. Composition of Placenta barrier
OBJECTIVES 1. The components of fetal membrane and their functions. 2. Structure and function of placenta 3. Composition of Placenta barrier
Fetal membrane(胎膜) o Originate from blastocyst (i 多“ /Amnion sE), don' t participate in the Embryo yOlk sac formation of embryo Charion iNcluding 1) Chorion(绒毛膜) 2) Amnion(羊膜) 3) Yolk sac(卵黄囊) 4) allantois(尿囊) 5)儿 mbilical cord(脐带) Extraembryonic Membranes
Fetal membrane （胎膜） •Originate from blastocyst（胚 泡）, don’t participate in the formation of embryo •Including: 1) Chorion（绒毛膜） 2) Amnion（羊膜） 3) Yolk sac（卵黄囊） 4) Allantois（尿囊） 5)Umbilical cord（脐带）
Chorion(绒毛膜) Formed by trophoblast +extraembryonic mesoderm chorion frondosum(丛密绒毛膜) embryonic pole Chorion laeve(平滑绒毛膜) abembryonic pole Decidua basalis Decidua Chorion parietalis frondosum connecting Chorion cavity. Decidua capsularIs Uterine
Chorion（绒毛膜） •Formed by trophoblast +extraembryonic mesoderm •Chorion frondosum（丛密绒毛膜）- embryonic pole •Chorion laeve（平滑绒毛膜）- abembryonic pole
Chorion Primary villi(2w): cytotrophoblast +-syncytiotrophoblast Secondary villi (3w): extraembryonic mesoderm enter the primaryⅷii Tertiary villi (end of 3w ) extraembryonic mesoderm cT+BV y 复 6细血置 connecting y 胞战春层壳 chorionic yncytiotrophobla @ A Primary B C Tertiary villus
Chorion • Primary villi (2w): cytotrophoblast+syncytiotrophoblast • Secondary villi (3w):extraembryonic mesoderm enter the primary villi • Tertiary villi (end of 3w): extraembryonic mesoderm =>CT+BV