LIFE SCIENCE

Detailed explanation-1: -The placental membrane is where the mother and fetus exchange gases, nutrients, etc. The membrane forms by the syncytiotrophoblast, cytotrophoblast, embryonic connective tissue (Wharton’s jelly), and the endothelium of fetal blood vessels.

Detailed explanation-2: -The structure which connects the placenta and foetus is the umbilical cord.

Detailed explanation-3: -Placental tissues, or extra-embryonic tissues, also commonly referred to as birth tissues, support and protect fetal development during gestation. They include the placental disc, the umbilical cord, placental membrane, and amniotic fluid (Figure 1A).

Detailed explanation-4: -Placenta is a special tissue connection between embryo and uterine wall. It acts as an endocrine gland. Role of placenta: It possesses villi that increase the surface area for absorption of nutrients.