Question

The main function of trophectoderm in mammalian embryo is

• A. Protection of the developing cells.
• B. Drawing food for the developing cells.
• C. Formation of yolk sac.
• D. Formation of body of developing embryo.

Answer 1

The correct option is B Drawing food for the developing cells.

Trophectoderm is the outermost layer of cells in the mammalian blastodermic vesicle, which will make contact with the endometrium and take part in establishing the embryo's means of receiving nutrition.

It is the cell layer from which the trophoblast differentiates.

Thus, the correct answer is option B.