The endoderms forms A) muscle B) blood C) neural tissue D) skin E) the urinary b

Question

The endoderms forms A) muscle B) blood C) neural tissue D) skin E) the urinary bladder. The mesoderm and the trophoblast combine to form the A) amnion B) amniotic sac C) chorion. D) allantois E) None of the answers is correct. The extraembryonic membrane that forms a fluid-filled sac is the A) yolk sac B) amnion C) allantois D) All of the answers are correct E) None of the answers is correct. The extraembryonic membrane that forms the fetal portion of the placenta is the A) yolk sac B) amnion C) allantois D) chorion E) None of the answers is correct Which of the following is one of the critical events of the first trimester? A) cleavage B) implantation C) placentation D) gastrulation E) All of the answers are correct.

Explanation / Answer

34. Mesoderm forms

E. Urinary bladder

35. Mesoderm and trophoblast together forms

C chorion

36 extraembryonic membrane that forms a fluid filled sac is

B Amnion

37 extraembryonic membrane that forms placenta is

D Chorion

38 E all of above

All events are critical during first trimester.

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