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Human reproductive organs, fertilisation and growth of the embryo sheet
5-mark answer frame

Draw a labelled diagram of the human female reproductive system. Describe the events from fertilisation to the birth of a baby.

How to lay out the answer. Follow the frame, then write it in your own words.

  1. 1 · Open in one line. The female reproductive system makes eggs and holds the growing baby until birth.
  2. 2 · Name the organs. Ovaries (eggs, oestrogen and progesterone), fallopian tubes (fertilisation), uterus (where the embryo grows), cervix and vagina.
  3. 3 · Fertilisation. An egg released from the ovary meets a sperm in the fallopian tube; their nuclei fuse to form a zygote.
  4. 4 · Implantation and growth. The zygote divides into a ball of cells, implants in the thick uterus wall, and grows as an embryo, then a foetus, for about 280 days.
  5. 5 · Birth. Oxytocin from the posterior pituitary makes the uterus contract, and the baby is born.
  6. 6 · Draw the system. [Diagram: ovaries, fallopian tubes, uterus, cervix, vagina; mark where fertilisation and implantation happen]
  7. 7 · Link to daily life. Regular check-ups and a nutritious diet in pregnancy keep both mother and baby healthy.
  8. 8 · Close in one line. So a single zygote grows, step by step, into a new human being.

Scoring tip: Write that fertilisation happens in the fallopian tube, not the uterus; it is a common error.