The blastocyst differs from the trophoblast in that the blastocyst
A) is composed of an inner layer of cells that will finally develop into the embryo.
B) is the outermost layer of the embryo that will eventually produce the surface parts.
C) is the outer layer of cells that later provides nutrition and support for the embryo.
D) is a disk-shaped group of tissues in which small blood vessels from the mother and the offspring intertwine but do not join.

Question

Quizplus · Accepted Answer

The blastocyst is composed of an inner layer of cells called the embryoblast, which will develop into the embryo, and an outer layer of cells called the trophoblast, which will provide nutrition and support for the developing embryo, as well as eventually develop into the placenta. Therefore, while the trophoblast is the outermost layer of the blastocyst, the embryoblast is the layer that will develop into the embryo itself.

The Blastocyst Differs from the Trophoblast in That the Blastocyst