Give reasons : Uterine lining becomes thick and spongy after fertilisation.
Generated by claude-sonnet-4-6 · 2026-06-15 06:46 · grounding rag
Model Answer
After fertilisation, the embryo is implanted in the uterus wall. The uterine lining becomes thick, spongy, and is richly supplied with blood to nourish the growing embryo. This thickened lining provides the necessary nutrients and oxygen required for the development of the embryo inside the mother's womb.
Source: Chapter 7, Section 7.3.3(b) – Female Reproductive System
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Explanation
- The key reason the examiner wants is: to nourish/implant the embryo.
- Mention that the lining is richly supplied with blood — this is a specific textbook detail that fetches marks.
- Avoid confusing this with menstruation (which happens when fertilisation does NOT occur).
- For a 2-mark question, one sentence stating the purpose + one sentence on blood supply is sufficient.