Protective Coats of Embryo

Protective Coats of Embryo
Definition

The membrane that protect the embryo are called embryonic membranes.
These membranes often called extra-embryonic coats. The embryonic membranes found in reptiles, birds and mammals are
1. Amnion
2. Chorion
3. Allantois
1. Amnion
Amnion is a membrane that develops and surrounds the embryo completely. Amnion encloses the embryo in a fluid filled space known as amniotic cavity. The cavity is filled with amniotic fluid.
Functions
The amniotic fluid performs the following important functions

• It supports and cushions the embryo fetus before birth.
• It is a shock absorber.
• It also protect the embryo fetus against mechanical injury.

2. Chorion
It is embryonic membrane that covers the embryo completely and present on extreme outer side of the embryo near the egg shell.
Function

• It protects the embryo and assist it in nutrition and excretion.

3. Allantois
It is an embryonic membrane which arises from hind gut of embryo and protect the embryo.
Functions

• It stored food material and harmful nitrogenous waste.
• It help in the formation of umblical cord