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Question
The foetal membrane, which is the source of first blood corpuscle to enter the circulation of the embryo is known as
The foetal membrane, which is the source of first blood corpuscle to enter the circulation of the embryo is known as
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Solution
The correct option is D Yolk sac
The yolk sac is the extraembryonic membrane that surrounds the egg yolk. It has a well-developed vascular system, that transports nutrients from the egg yolk to the developing embryo. It is the principal site of RBC production until 6-8 weeks of embryonic development. During the second trimester, the liver is the primary source of RBCs.
So, the correct answer is option D.
The yolk sac is the extraembryonic membrane that surrounds the egg yolk. It has a well-developed vascular system, that transports nutrients from the egg yolk to the developing embryo. It is the principal site of RBC production until 6-8 weeks of embryonic development. During the second trimester, the liver is the primary source of RBCs.
So, the correct answer is option D.
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