The mesoderm and the cytotrophoblast combine to form the
A)amnion.
B)amniotic sac.
C)chorion.
D)allantois.
E)None of the answers is correct.

Question

Quizplus · Accepted Answer

The mesoderm and cytotrophoblast combine to form the chorion, which is the outermost fetal membrane that surrounds the embryo and gives rise to the placenta. Option A, amnion, is formed from the ectoderm and mesoderm and surrounds the embryo, while option B, the amniotic sac, refers to the space enclosed by the amnion. Option D, allantois, is an extraembryonic membrane that functions in waste elimination and blood vessel formation, and is derived from the endoderm and mesoderm.

The Mesoderm and the Cytotrophoblast Combine to Form the