Summary
Reproduction in humans ensures the continuity of the species by transmitting genetic information with variation. This involves the male and female reproductive systems, gamete production, fertilization, and development of the embryo into a foetus.
- Testis — organ producing male gametes (sperms) and sex hormones. Example: Testes produce sperm cells that are necessary for fertilization.
- Ovary — organ producing female gametes (ova) and sex hormones. Example: Ovaries release eggs during ovulation.
- Fertilization — fusion of male and female gametes to form a zygote. Example: Sperm penetrates the ovum in the oviduct.
- Zygote — the initial cell formed when two gamete cells are joined. Example: The zygote undergoes division to become an embryo.
- Menstrual Cycle — regular natural changes in the female reproductive system that make pregnancy possible. Example: Ovulation occurs around day 14 of the cycle.
- Placenta — organ that facilitates exchange of nutrients and waste between mother and foetus. Example: The placenta provides oxygen to the developing foetus.
Exam Tips
Key Definitions to Remember
- Testis: Organ producing sperms and hormones
- Ovary: Organ producing ova and hormones
- Fertilization: Fusion of sperm and egg
Common Confusions
- Difference between sperm and semen
- Role of placenta vs. amniotic fluid
Typical Exam Questions
- What is the function of the testis? Production of sperms and male hormones
- How does fertilization occur in humans? Sperm penetrates the ovum in the oviduct
- What changes occur during the menstrual cycle? Thickening of uterine lining and ovulation
What Examiners Usually Test
- Understanding of the menstrual cycle phases
- Functions of male and female reproductive organs
- Process and significance of fertilization