animation IVF video

Testis Structure HL animation

Spermatogenesis HL

animation Pearson overview

Spermatogenesis and hormones HL

Production of semen HL Epididymis: testicle fluids are removed and the sperm concentrated sperm mature here and develop the ability to swim Seminal vesicles: adds nutrients that include fructose sugar for respiration mucus to protect sperm in the cell Prostate: adds fluids that neutralise the vaginal acids and minerals ions

Ovary Structure HL

Ovary Structure HL

Oogenesis HL

Oogenesis HL

Spermatogenesis versus Oogenesis HL Similarities: Both begin with mitosis Both make use of LH and FSH Both include two meiotic reduction division Differences: HOMEWORK!

Sperm and Egg cell HL

Fertilisation HL

Embryo development HL HCG: Secretion of Progesterone and Estrogen by Corpus Luteum Progesterone and Estrogen inhibit FSH-LH – so no more eggs are released Progesterone maintain endometrium, where the blastocyst develops into a fetus and the placenta forms HCG Progesterone Estrogen

Placental structure: HL Placental villi

Hormonal Control of Birth HL

Hormonal Control of Birth HL