Human Reproduction Flashcards
(19 cards)
What is reproduction
Production of new individual
Boy body changes
Growth of body hair
Growth spurt
Growth of testes
Parts of male reproductive system (5)
Scrotum-sac in which testes are held
Sperm ducts-carry sperm from testes to penis
Penis- allows sperm to pass through to Vaguna
Testes-make sperm
Urethra
Parts of female reproductive system 5
Ovaries-produce eggs
Fallopian tube-carry’s egg from ovaries to uterus
Uterus-place baby develops in
Cervix-opening or neck of uterus
Vagina-pens releases sperm into
What us the menstrual cycle
Series of changes that take place in human bodies
Menstrual cycle day 1-5
Lining of uterus breaks down and passes out of vagina
Menstrual cycle day 6-13
New lining develops
Day 14
Eggs released (ovulation)
Menstrual cycle 15-28
Lining remains in place until cycle starts again
What is fertile period
Day famale most likely to become intercourse if she has intercourse
How long do egg+ sperm last
Egg-2days
Sperm-5 to 7 days
What is fertilisation
Sperm joins with nucleus of an egg
Fertilised egg forms single cell called zygote
Amniotic fluid
Protects baby during pregnancy
Functions of placenta
Food+oxygen
Waste products transported out
What happens at stage 1 of birth
Muscle is uterus contract.contractions cause amnion to burst and water breaks (amnion fluid leaves through vaguna)
What happens at stage 2 of birth
Cervix widens contractions cause baby to be pushed hard first through vagina umbilical cord is clamber and later cut and baby take first breath
What happens at stage 3 of birth
Uterus continues to contract after baby is born contractions push placenta and rest of umbilical cord out of vaguna (afterbirth)
What is contraception
Artificial methods used to prevent pregnancy preventing fertilisation-avoid intercourse during fertile period artificial ways are condom
IVF
take egg + sperm from female+male placing in Petri dish leave to fertilise outside of body the place ebroyos into females womb
