Downloaded 58 times
Uploaded byrubina sultana
fetal membrane : Yolk sac
The fetal membranes include the yolk sac, chorion, amnion, umbilical cord, connecting stalk, allantois, vitelline duct, and placenta. The yolk sac is a membranous sac attached to the embryo that is formed from hypoblast cells next to the embryonic disk. It undergoes several modifications from a primitive yolk sac at 9 days to a final yolk sac by 8 weeks as the embryo develops.
fetal membrane : Yolk sac
- 1.
- 2. Names of theFetal membrane: • yolk sac • chorion, • amnion, • umbilical cord, • connecting stalk • allantois, • vitelline duct, • placenta,
- 4.
- 5. yolk sac • Definition Theyolk sac is a membranous sac Attached to an embryo, formed by cells of the Hypoblast adjacent to the Embryonic disk
- 6. Modifications of yolksac • Primitive yolk sac /exocoelomic cavity. • Secondary yolk sac • Final yolk sac
- 7.
- 8.
- 9.
- 10.
- 11.
- 12.
- 13.
- 14.
- 17.