(a) Name the part performing following functions in human female reproductive system :
(i) production of eggs
(ii) site of fertilization
(iii) site of implantation
(iv) entry of the sperms
(b) What changes are observed in the uterus :
(i) subsequent to implantation of zygote and
(ii) if an egg does not get fertilized ?
Generated by claude-sonnet-4-6 · 2026-06-15 06:45 · grounding rag
Model Answer
(a)
(i) Production of eggs — Ovaries
(ii) Site of fertilisation — Fallopian tube (oviduct)
(iii) Site of implantation — Uterus (uterine lining)
(iv) Entry of sperms — Vagina
(b)
(i) After implantation of zygote:
The uterus prepares itself to receive and nurture the growing embryo. Its lining thickens and becomes richly supplied with blood to nourish the embryo. A special tissue called placenta develops, which is embedded in the uterine wall. It allows glucose and oxygen to pass from mother to embryo and waste substances to be removed.
(ii) If the egg is not fertilised:
The thickened uterine lining is no longer needed. It slowly breaks down and sheds along with blood vessels. This shedding is called menstruation, which occurs approximately every 28 days.
Source: Chapter 7, Section 7.3.3(b) — Female Reproductive System
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Explanation
- Part (a) is straight recall — 1 mark per point, so one word/phrase each is enough.
- Part (b)(i) expects mention of: lining thickening, blood supply, and placenta — these are the three key ideas examiners look for.
- Part (b)(ii) should clearly state that the lining breaks down and is shed as menstruation (the word "menstruation" must appear).
- Do not confuse site of fertilisation (fallopian tube) with site of implantation (uterus) — this is a very common exam error.