Important questions in 12th chapter 2 ( Human Reproduction)
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Q.3. State the significance of cervix in the female reproductive system.
A.3. The cervix is a narrow opening through which the uterus opens up to the vagina. The cervical canal is the cavity of the cervix which alongside the vagina goes on to form the birth canal.
Q.4. What is the reason for the absence of menstrual cycles during conception or pregnancy?
A.4. During pregnancy, all the events of the menstrual cycle stop and there is no menstruation. Menstruation occurs only when the egg that is released is not fertilized. But in pregnancy, the released egg is fertilized and hence the uterus lining does not shed, instead nourishes the fetus. However, a woman may experience uterine bleeding during pregnancy due t
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