The blastocyst consists of the
A)blastocyst and amnion.
B)morula and placenta.
C)chorion and inner cell mass.
D)embryo and chorion.

Question

Quizplus · Accepted Answer

The blastocyst consists of two distinct cell populations, the inner cell mass and the trophectoderm. The trophectoderm gives rise to the chorion, which is the outermost fetal membrane surrounding the embryo. The inner cell mass gives rise to the embryo itself. Therefore, both the chorion and the inner cell mass are components of the blastocyst, making choice C the correct answer. Choices A, B, and D are all incorrect options as they either do not include both the chorion and inner cell mass or they include additional structures that are not part of the blastocyst.

The Blastocyst Consists of the