B10.3 sexual reproduction in humans

fuction of testes

production of sperm

fuction of scrotum

sac that holds testes outside the body

fuction of sperm ducts

transfer sperm to the urethra

fuction of prostate gland

secrete fluid for sperm to swim in forming semen

fuction of urethra

carries urine and semen out of the body

fuction of penis

transfers semen during vagina

fuction of ovaries

release female gametes

fuction of oviducts

transfers egg to uterus and is the site of fertilisation

fuction of cervix

ring of muscle at the opening of the uterus

fuction of vagina

recieves penis

fuction of unbilical chord

transfers oxygen and nutrients (glucose) and removes waste products (urea, carbon dioxide)

fuction of placenta

supplies oxygen and nutrients, filters out toxins and harmful substances, large surface area, thin membrane

fuction of amniotic sac

contains amniotic fluid

fuction of amniotic fluid

protects foetus against knocks and bumps, provides support,

HIV stands for

human immunodeficiency virus

HIV infection may lead to

acquired immune deficiency syndrome (AIDS)

fertilisation

fusion of nuclei from a male gamete (sperm) and a female gamete (egg)

the larger gamete

female: egg

the gamete that travels the farthest distances

male: sperm

the gamete produced in larger numbers

male: sperm

pathway from sperm cells to vagina

testes —> sperm ducts —> urethra —> vagina

female gamete structure and features

jelly coating, energy stores, nucleus containing chromosomes from mother

male gamete structure and features

streamlined head, flagellum, enzymes for eating through coating of egg, mitochondria for energy, nucleus containing chromosomes from father