In humans,from which extraembryonic membrane will the first blood cells arise?
A)allantois
B)yolk sac
C)chorion
D)amnion

Question

Quizplus · Accepted Answer

In humans, the first blood cells arise from the yolk sac. The yolk sac is one of the extraembryonic membranes that develops in the early stages of embryonic development. It is responsible for providing nutrients to the developing embryo until the placenta fully forms. Additionally, it gives rise to the embryo's germ cells and the first blood cells. Therefore, option B is the correct choice.

In Humans,from Which Extraembryonic Membrane Will the First Blood Cells