The foetal membrane which is the source of th | vedclass

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(D) The $Yolk sac$ is the first site of hematopoiesis (blood cell formation) in the developing human embryo.It produces the first blood corpuscles bef

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Yolk sac

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(D) The $Yolk sac$ is the first site of hematopoiesis (blood cell formation) in the developing human embryo.It produces the first blood corpuscles before the liver and bone marrow take over this function later in development.Therefore, it is the source of the first blood corpuscles that enter the embryonic circulation.

The foetal membrane which is the source of the first blood corpuscles to enter the circulation of the embryo is called:

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