1. A – The reproductive system
The structure and function of reproductive organs and gametes and their role in fertilisation
Hormonal control of reproduction
The biology of controlling fertility
Ante- and postnatal screening

2. KA 1: The structure and function of reproductive organs and gametes and their role in fertilisation
(a) gamete production in males
Reproduction
(c) site of fertilisation
(b) gamete production in females

3. Describe the process of gamete production in the testes.
KA 1: The structure and function of reproductive organs and gametes and their role in fertilisation
Describe the process of gamete production in the testes.
Describe the role of the following structures in sperm and semen production:
seminiferous tubules
interstitial cells
testosterone
prostate gland
seminal vesicles.

4. Re-cap!
Germline cells
Whilst somatic cells eventually form to create the different body tissues, germline cells eventually give rise to gametes (sex cells: eggs and sperm).

5. Re-cap!

6. The Male Reproductive System

7. The Male Reproductive System

8. The Male Reproductive System
Structure
Description & function
Testes
Sperm
Semen
Seminal Vesicle
Prostate Gland
Complete your table as we go through the next few slides!

9. The Male Reproductive System
Testes
Site of sperm production
Sperm production occurs in the seminiferous tubules
Manufactures testosterone in interstitial cells

10. The Male Reproductive System
Sperm
– Male gamete. Motile (capable of movement)
– Need fluid for motility
- Need source of energy to move
Semen
Milky fluid containing sperm and liquid secretions from the seminal vesicles and prostate gland

11. The Male Reproductive System
Seminal Vesicles
Produces a liquid rich in fructose (acts as an energy source for sperm)
Liquid has hormone-like compounds to stimulate contractions of female reproductive tract (helps sperm reach the oviduct faster)

12. The Male Reproductive System
Prostate Gland
Produces liquid containing enzymes to maintain fluid (in semen) at optimum viscosity for sperm mobility.

13. Summary: The Male Reproductive System
Testes produce sperm in the seminiferous tubules and the hormone testosterone in the interstitial cells.
The prostate gland and seminal vesicles secrete fluids that maintain the mobility and viability of the sperm.
viability seminal vesicles
interstitial mobility
seminiferous

14. Cross section of a testis
Identify parts A-E:
Seminiferous tubule A
Could be a plenary E
Sperm
Interstitial cell D B C
Germline cell
Germline cell