Question

Choose the correct answers from the alternatives given.
The principal embryonic membranes are

• A. Chorion and umbilicus
• B. Amnion and placenta
• C. Amnion and chorion
• D. Placenta and umbilicus

Answer 1

The correct option is C Amnion and chorion

The placenta is an ephemeral organ found only in eutherian mammals during gestation. Placenta is the only organ composed of cells derived from two different organisms i.e. from the fetus and the mother. The fetal membranes are chorion and amnion. The membranes from the uterine wall are deciduas basalis. It is the portion of the deciduas which is directly adjacent to conception at the implantation site. Decidua is a mucous membrane lining the uterus during pregnancy and it cast off during childbirth. After the implantation of the embryo, the uterine endometrium is called decidua. Thus the principal embryonic membranes are Amnion and chorion.

So the correct option is ' Amnion and chorion '.