The Chorion Forms from the ________

Question

The chorion forms from the ________.
A) inner cell mass
B) placenta
C) trophoblast
D) ectoderm
E) endoderm

Accepted Answer

The chorion is one of the extraembryonic membranes that form in the early embryonic development. It is derived from the trophoblast, which is one of the earliest cells that differentiate from the zygote after fertilization. The chorion later contributes to the formation of the placenta, which is an important organ that connects the developing fetus to the mother's uterus and facilitates nutrient and gas exchange between them. The inner cell mass gives rise to the embryo proper, while the ectoderm and endoderm are the two primary germ layers that give rise to various tissues and organs in the developing embryo.