东pregancy physiology课件2.pptxVIP

1 Formation and Functions of Placenta and other fetal affiliated tissues Section 3 2 placenta The placenta is made of amnion，chorionic plate，villus and basal plate 3 The placenta  in the 3rd trimester Like a plate， roundness or ellipse Wight 450～650g，diameter16～20cm 1～3cm thick 4 placenta 1 Cotyledon2 Cut edge of the amnion 3 Umbilical cord  4 Decidua with the compact layer after the release of the placenta  1 Cotyledon 2 Cut edge of the amnion 3 Umbilical cord  Fetal portion maternal portion maternal portion Fetal portion 5 placenta  1 umbilical cord 2 amnion 3chorionic plate 4 intervillous space （ maternal blood） 5 basal plate 6 cotyledon 7 vilus 6 Placenta-- amnion amnion chorion 1 、The amnion is a membrane that fills with fluid and provides a protective environment for the developing embryo.  2、0.02~0.05mm 3、smooth，without vessel，nerve and lymph 7 placenta  1 umbilical cord 2 amnion 3chorionic plate 4 intervillous space （ maternal blood） 5 basal plate 6 cotyledon 7 vilus 8 Placenta-- chorionic plate chorionic plate（fetal part） cytotrophoblast syncytiotrophoblast placental villi cytotrophoblast layer intervillous spaces amnion extra-embryonic mesenchyma 9 syncytiotrophoblast cytotrophoblast chorion amnion Free villi Anchoring vills cotyledons 10 Primary villus syncytiotrophoblast cytotrophoblast Secondary villus Tertiary villus fetal capillary enter the stroma Placenta--villus 11 绒毛形成过程 胎儿附属物的形成及其功能 Primary villus Secondary villus Tertiary villus 12 13 Placenta—villus—chorion frondosum fetal lobe （60-80） fetal lobule （200） 14 placenta  1 umbilical cord 2 amnion 3chorionic plate 4 intervillous space （ maternal blood） 5 basal plate 6 cotyledon 7 vilus 15 Placenta—basal plate basal plate 20 cytotrophoblast syncytiotrophoblast decidua basalis 16 Placenta—how does it work 17 Placenta—what does it do 1、 blood transfusion 500ml/min 2、full-term ， superficial area about 12-14m2 3、maternal-fetal interface：O2 and C