Which of the following structures contributes to the structure of the placenta as well as completely surrounding the embryo?

Question

Quizplus · Accepted Answer

The chorion is the outermost membrane of the fetal membranes and completely surrounds the embryo. It also contributes to the formation of the placenta. The yolk sac provides nutrients for the early embryo but does not contribute to the placenta. The allantois helps with waste disposal and the formation of blood vessels, but does not completely surround the embryo. The amnion is a membrane that surrounds and protects the embryo, but also does not contribute to the placenta.

Which of the Following Structures Contributes to the Structure of the Placenta