Mention one function each of the following parts with respect to the female reproductive system:
$(a)$ Vagina
$(b)$ Ovary

(N/A) Vagina: It serves as the birth canal and the passage for the entry of sperms into the female reproductive tract during sexual intercourse.
$(b)$ Ovary: It is responsible for the production of female gametes (ova or eggs) and the secretion of female sex hormones like estrogen and progesterone.