(a) Draw a sectional view of human female reproductive system and label the part where; (i) eggs develop.; (ii) fertilisation take place.; (iii) fertilised egg gets implanted....; (b) Describe, in brief, the •changes the uterus undergoes; (i) to receive the zygote.; (ii) if zygote is not formed.(All India - 2014)
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Explanation:
- (i) Egg develops by the process of oogenesis in the female reproductive organ called the Ovaries. Each female has one pair of ovaries in the lower abdominal cavity.
- (ii) The fertilisation of the sperm and the ovum takes place inside the Fallopian tube.
- (iii) Fertilised egg gets implanted in the endometrial lining of the uterine wall.
- (b) (i) The endometrial layer of the uterine lining thickens and forms a compact bed for receiving the zygote in case of pregnancy. It develops blood vessels, which would provide nourishment to the developing zygote.
- (b)(ii) If no zygote is formed the endometrial lining breaks and the blood along with the tissue lining is removed from the body through menstruation.
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