Question

Chorionic villi and uterine tissue fuse to form ________

• A. Zygote
• B. Blastula
• C. Placenta
• D. Endometrium

Answer 1

Answer:

C. Placenta

Trophoblasts project chorionic villi into the endometrium to derive nutrition from the uterine wall. The uterine tissue, in turn, surrounds it along with the blood vessels. These two tissues interdigitate to form the placenta.