Question : (a) Specify the events which occur in the reproductive system of human female: (i) If egg is fertilised. (ii) If egg is not fertilised. (b) Mention the changes that take place in uterus in both the above events.

Question : (a) Specify the events which occur in the reproductive syst

1.	Question : (a) Specify the events which occur in the reproductive system of human female: (i) If egg is fertilised. (ii) If egg is not fertilised. (b) Mention the changes that take place in uterus in both the above events.
Answer» Solution :(a) (i) Pregnancy (ii) Menstruation. (b) In first case, the lining of uterus BECOMES thick and spongy, richly supplied with blood, helps in implantation of the EMBRYO. In SECOND case, the lining breaks along with blood vessels and comes out through vagina as menstrual flow.