The embryo develops from cells of the
A) blastocyst outer layers.
B) blastocyst inner cell mass.
C) gastrula mesoderm.
D) gastrula ectoderm.
E) gastrula endoderm.

Question

Quizplus · Accepted Answer

The inner cell mass of the blastocyst is the group of cells that will go on to form the embryo. The outer layers of the blastocyst will form the placenta and other supportive tissues. The mesoderm, ectoderm, and endoderm form during gastrulation, which occurs after the inner cell mass has already been established.

The Embryo Develops from Cells of the