Question

When and where do chorionic villi appear in humans? State their function.

Answer 1

Chronic villi are finger like projections that appear on the trophoblast after implantation. It is surrounded by the uterine tissue and maternal blood.

Function: The structural and functional unit formed between the developing embryo and maternal body when chorionic villi and the uterine tissue becomes interdigitated with each other is called placenta. it nourishes the developing embryo.