Question

Study the following and identify the correct combinations.

Extra embryonic membrane	Formed by	Function
A- Amnion	Somatopleure	Protection
B- Allantois	Splanchnopleure	Placenta development
C- Yolk sac	Mid gut	Nutrition
D- Chorion	Outer wall of amniotic fold	Excretion

• A. A and B
• B. B and D
• C. A and C
• D. B and C

Answer 1

Answer: (A)

A and B

Amnion is the first membrane that is formed by somatopleure. It closely covers the embryo and forms a sac that serves as a protective environment for the developing embryo.
Allantois is the fetal membrane arises from splanchnopleure and lies below the chorion. It is responsible for the induction of placental development.
Yolk sac is the membranous sac containing yolk attached to the embryo. It is involved in the early embryonic blood supply.
Chorion is the outermost membrane that surrounds the embryo and contributes to the formation of the placenta.
Therefore, the correct answer is option A.