Summary
Reproduction in humans ensures the continuity of the species through the transmission of genetic information with variation. This process involves the male and female reproductive systems, gamete production, fertilization, and development of the embryo into a foetus.
- Testis — organ that produces male gametes (sperms) and sex hormones. Example: The testis is responsible for sperm production.
- Ovary — organ that produces female gametes (ova) and sex hormones. Example: The ovary releases an ovum during ovulation.
- Fertilization — the fusion of male and female gametes to form a zygote. Example: Fertilization occurs in the oviduct.
- Zygote — the cell formed by the fusion of two gametes. Example: The zygote undergoes division to become an embryo.
- Menstrual Cycle — a monthly cycle preparing the female body for pregnancy. Example: Ovulation occurs around day 14 of the menstrual cycle.
- Placenta — organ that facilitates exchange of materials between mother and foetus. Example: The placenta provides nutrients and oxygen to the foetus.
Exam Tips
Key Definitions to Remember
- Testis: Organ producing sperms and male hormones
- Ovary: Organ producing ova and female hormones
- Fertilization: Fusion of male and female gametes
- Menstrual Cycle: Monthly cycle preparing for pregnancy
Common Confusions
- Difference between ovulation and menstruation
- Role of seminal fluid vs. semen
Typical Exam Questions
- What is the function of the placenta? The placenta exchanges nutrients and waste between mother and foetus.
- How does the menstrual cycle prepare the body for pregnancy? It thickens the uterine lining for potential implantation of a fertilized ovum.
- What are secondary sexual characteristics? Traits that develop during puberty, such as facial hair in males and breast development in females.
What Examiners Usually Test
- Understanding of the menstrual cycle phases
- Differences between male and female gametes
- Functions of the male and female reproductive systems
