Gamete production in the testes

• Testes produce sperm in the seminiferous tubules and testosterone in the interstitial cells.
• The prostate gland and seminal vesicles secrete fluids that maintain the mobility and viability of the sperm.

Gamete production in the ovaries

• The ovaries contain immature ova in various stages of development.
• Each ovum is surrounded by a follicle that protects the developing ovum and secretes hormones.

Fertilisation

• Mature ova are released into the oviduct where they may be fertilised by sperm to form a zygote.