Extraembryonic Membranes

[vlc1500]

Extraembryonic Membranes are vital to the success of reptiles, birds, and mammals. How does this have any relation to the egg and the embryo?

[James]

Your question is odd. Do you know what an extraembryonic membrane is?

[dipjyoti]

Extraembryonic Membranes are vital to the success of reptiles, birds, and mammals. How does this have any relation to the egg and the embryo?

. Mean?

Check http://users.rcn.com/jkimball.ma.ultran ... ranes.html to know on it.

[vlc1500]

ok this is what i meant to say........
Extraembryonic Membranes are vital to the success of reptiles, birds, and mammals. Discuss with respect to the egg and the embryo.

[dipjyoti]

Extraembryonic Membranes
The embryos of reptiles, birds, and mammals produce 4 extraembryonic membranes:

amnion
yolk sac
chorion, and
allantois
With these four membranes, the developing embryo is able to carry on essential metabolism while sealed within the egg. Surrounded by amniotic fluid, the embryo is kept as moist as a fish embryo in a pond.

[vlc1500]

does anyone know exactly how the four membranes

amnion
yolk sac
chorion, and
allantois

work to protect the embryo and egg?

[Volvox]

I could answer this for you easily, but I think that you should Google each first and draw your own conclusions. Once you post them here, I will help you.