Human placenta is formed by

Options

A. Chorionic villi
B. Umbilical cord
C. Uterine tissue
D. Both A and C

Answer

D

Explanation

• After implantation, finger like projections appear on the trophoblast called chorionic villi (develops on chorion) which are surrounded by the uterine tissue and maternal blood.
• The chorionic villi and uterine tissue become interdigitated with each other and jointly form a structural and functional unit between developing embryo (foetus) and maternal body called placenta.