Extra Embryonic Membrane Flashcards
The amniotic sac is what
Watery environment the embryo develops on, sea water
After implantation, the ectoderm gives rise to what
amniotic membrane/amnion
The amnion does what
Surrounds developing embryo completely
Amnion is filled with what
Amniotic fluid
As the amnion is being formed, the endoderm gives rise to
Yolk sac
What function does the yolk sac serve in other vertebrates and what does it serve in hoomans
Others - nutritive
Hoomans - blood cell formation
Blood cell formation in yolk sac gives rise to what tubular structure
Allantois
Allontois forms what of what
Blood vessels of umbilical cord
After formation of amnion and yolk sac, mesoderm gives rise to
Chorionic membrane / chorion
The chorion splits into what two layers
Outer and inner
Outer chorion layer combines with what
Cytotrophoblast
Formation of cyto trophoblast and outer chorion forms what within what
Chorionic villi (blood capillaries) with developing placenta
The inner chorion layers form what
Protective layer around amniotic membrane
Space between layers of chorion is what
Extra embryonic coelum into which the yolk sac protudes
Placenta Previa what
Abnormal positioning of the placenta
