Amniotic egg Flashcards
1
Q
What is the amnion ?
A
The membrane surrounding the embryo.
It provides hydration and shock protection.
2
Q
What is the yolk sac ?
A
A sac that provides nutrients and in which the blood vessels grow.
3
Q
What is the allantois ?
A
A sac that stores the waste
4
Q
What is the chorion ?
A
The membrane that filters out CO2 and that enables the entry of O2.
5
Q
What is the shell ?
A
It prevents loss of water.
It allows gas exchange.
It is hard and protective.
6
Q
What classes have amniotic eggs ?
A
Reptilia (including birds)
Mammalia
