a] Name the parts of the human female reproductive system where
i] fertilisation takes place,
ii] implantation of the fertilised egg occurs.
b] Explain how the embryo gets nourishment inside the mother's body.
c] Write the function of following parts in human female reproductive system: i] Ovary ii] Oviduct iii] Uterus
d] Describe in brief the structure and function of placenta.
OR
Explain the structure and important role of placenta during gestation period of woman.

Explanation

a] i] oviduct ii] uterus
b] The embryo gets nutrition from the mother.s blood with the help of a special tissue called placenta.
c] i] Ovary: It produces egg (ovum). It also produces the hormones - oestrogen and progesterone.
ii] Oviduct: It is the site of fertilization. It carries egg (ovum) or fertilized ovum (zygote) to the uterus.
iii] Uterus: It is the site of development of embryo. It protects and nourishes the embryo.
d] Placenta: It is a disc embedded in uterine wall which contains villi on the embryo side of the tissue and blood space on mother side.
Function of placenta: Placenta functions as a site of exchange of materials between the blood of mother and foetus. It provides a large surface area for glucose and oxygen to pass from the mother to the baby. The foetus gives away waste products and carbon dioxide to the mother.s blood for excretion.