The figure shows a human embryo 31 days after conception.Which of the following structures is part of the placenta?
A)embryo
B)chorion
C)amnion
D)yolk sac

Question

The figure shows a human embryo 31 days after conception.Which of the following structures is part of the placenta? 
A)embryo 
B)chorion 
C)amnion 
D)yolk sac

Quizplus · Accepted Answer

The chorion, which is visible in the figure at this stage of development, is the outermost membrane surrounding the embryo and is significant in the formation of the placenta. Therefore, B (chorion) is the correct choice. A (embryo), C (amnion), and D (yolk sac) are not part of the placenta.

The Figure Shows a Human Embryo 31 Days After Conception