BiologyGuideCells & MoleculesDiseasesEcosystemHuman BiologyAQA BIOL1AQA HBIO1AQA HBIO2AQA HBIO4AQA HBIO5
DevelopmentDigestionGrowthHomeostasisHuman BodyNervous SystemNutritionReceptorsReproductionRespiratory GasesSenescenceSkeletal Muscle
Video tutorials

Supplemental Videos

Click here to watch video tutorials for exam board specific videos by A* students

Histology of the Testis

Histology of the Ovary

Gametogenesis (→Formation of Gametes)

SAME in both sexes a) spermatogenesis, b) oogenesis

How gametogenesis differs in females

Follicle Development/Ovarian Cycle

Follicular stage [days1-13]

Ovulation [day14]

// Mature ovarian follicle ≈15mm in diameter

Luteal phase [days15-28]


Uterine Cycle

Structure of a Mature Sperm Cell

Movement of Sperm in the Female Reproductive Tract

Structure of the Egg

Acrosome Reaction and Penetration of the Oocyte Membrane

Female Infertility

Male Infertility

In Vitro Fertilisation (IVF)