Chapter 13 · ICSE Class 10 Biology (Selina Concise)

The Reproductive System

Explore the male and female reproductive organs, and the journey from fertilization to a developing embryo.

👶 Chapter 13

Fertilization in the fallopian tube and implantation in the uterus Sperm meets egg and fertilizes it in the fallopian tube, and the resulting embryo then travels down and implants in the uterus lining Fallopian tube (fertilization occurs here) Uterus Embryo implants
13.1

Male and Female Reproductive Systems

The male reproductive system's testes produce sperm; the female reproductive system's ovaries produce eggs (ova).

1

What do the testes produce?

Sperm

2

What do the ovaries produce?

Eggs (ova)

13.2

Fertilization and Implantation

Fertilization — the fusion of sperm and egg — occurs in the fallopian tube. The resulting embryo then travels to the uterus, where it implants into the uterine lining to develop.

1

Where does fertilization normally occur?

In the fallopian tube

2

What happens to the embryo after fertilization?

It travels to the uterus and implants into the uterine lining, where it develops

Practice

Exercises

1. What do the testes produce?

2. What do the ovaries produce?

3. Where does fertilization normally occur?

4. What is implantation?

5. Approximately how long is the human gestation period?

6. What organ does the developing embryo implant into?

7. Why must fertilization happen in the fallopian tube rather than the uterus itself?

8. What is the difference between a sperm cell and an egg cell in terms of size and mobility?

9. Why does only one sperm typically fertilize an egg, even though many may reach it?

10. Why is a stable, nutrient-rich uterine lining important for implantation?

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