Question

Extra embryonic membrane that immediately surrounds and protects the embryo is ______.

Options

• Chorion

• Yolk sac

• Amnion

• Trophoblast

Answer 1

Extra embryonic membrane that immediately surrounds and protects the embryo is Amnion.

Explanation:

The amnion is the extra-embryonic membrane that directly surrounds and protects the embryo, enclosing it in amniotic fluid which acts as a shock absorber. The chorion is the outermost layer, the yolk sac provides nutrition, and the trophoblast is involved in implantation, none directly enclose the embryo.