The extraembryonic membranes of the mammalian embryo are derived from:
Correct answer: A. Trophoblast
- A. Trophoblast
- B. Inner cell mass
- C. Formative cells
- D. Follicle cell
Explanation
The trophoblast is the outer layer of cells that forms after the blastocyst stage during embryonic development. It plays a crucial role in implantation and eventually gives rise to important extraembryonic structures like the chorion and placenta. The chorion is responsible for gas exchange and nutrient transfer between the embryo and the mother. So, the trophoblast does contribute to the formation of extraembryonic membranes.
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