ICSE Class 10 Answered

Chorion is one of the membranes that exist during pregnancy between the developing foetus and the mother. Chorionic villi are finger-like projections that arise from the trophoblast layer that develops in the zygote after it has undergone implantation.

Functions of chorion:

• Chorionic villi interdigitates with projections from uterine tissue to form a structure called the placenta, which is the connecting link between the mother and the foetus.
• It facilitates the supply of oxygen and nutrients to the embryo.