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Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2004

  • question_answer
    The foetal membrane, which is the source of first blood corpuscle to enter the circulation the embryo, is called

    A)  amnion                                 

    B)  chorion          

    C)  trophoblast                      

    D)  yolk sac

    Correct Answer: D

    Solution :

    Yolk sac is an extra embryonic or foetal membrane. It is a membrane that surrounds the yolk. In mammals, it is reabsorbed before the embryo is borned. It is a first embryonic membranes, which begins to produce RBCs. Yolk sac is enclosed by outer mesoderm and inner endodermal layer.


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