The thin outer ring of cells on a blastocyst, termed the trophoblast, will become the
A) new organism's skin and hair.
B) structures that provide protective covering and nourishment.
C) embryonic disk.
D) nervous system and skin.

Question

Quizplus · Accepted Answer

The trophoblast layer of cells in a blastocyst will give rise to the structures that provide protective covering and nourishment to the developing embryo, such as the placenta and umbilical cord. It will not become the new organism's skin and hair, the embryonic disk, or the nervous system and skin.

The Thin Outer Ring of Cells on a Blastocyst, Termed