question_answer 55)

    A human female experiences two major changes, menarche and menopause during her life. Mention the significance of both the events.

Answer:

                    In human beings, initiation of menstruation at puberty (between age 9-15 years) is called menarche. While, menstrual cycles ceases around 50 years of agethat is termed as menopause .Menarche signifies the maturation and readiness of the female reproductive system for child bearing. It marks the capability of the ovaries to produce mature oocyte (female gamete) that cannot be fertilized by the sperm and also that the uterus is capable of supporting the foetal growth and development. Menopause signifies the end of child bearing age. At this age supply of healthy eggs is very low, the levels of the hormones secreted by the ovaries decline and the menstruation stops .The uterus no longer remains conductive for foetal growth.