The trophoblast seen during the formation of a blastocyst ultimately develops into the
A) chorion
B) allantois
C) yolk sac
D) amnion
E) blastocyst cavity

Question

Quizplus · Accepted Answer

The trophoblast gives rise to the chorion, which is the outermost membrane that surrounds and protects the developing embryo. The allantois and yolk sac arise from the inner cell mass, while the amnion forms from the epiblast layer of cells within the embryo. The blastocyst cavity is formed by the expansion of fluid within the blastocyst.

The Trophoblast Seen During the Formation of a Blastocyst Ultimately