Human Reproduction Flashcards
(24 cards)
Gamete
Sex cells
Sperm
Males gamete
Egg
Females gamete
Fertilisation
Fusion of egg and sperm to form a zygote
Zygote
Fertilised egg
Testes
Produce sperm and testosterone
Scrotum
Holds the testes
Sperm duct
Passes sperm to the penis
Penis
Passes sperm to the vagina
Urethra
Duct inside penis
Seminal fluid
A liquid that allows sperm to swim
Provides nutrients
Sperm
Tail is to help swim
The tail contains lots of mitochondria for energy
Energy is required to travel to fallopian tube
Head contains nucleus for fertilisation
Testosterone
Develops make sex organ
Broadens shoulders
Deepens voice
Grows hair
Ovary
Produces the egg and oestrogen
Fallopian tube
Where fertilisation occurs
Cervix
Allows sperm to enter the uterus
Vagina
Holds the penis
Uterus
Holds developing foetus
Oestrogen
Develops female sex organ
Develops breasts
Widens the hip
Grows hair
Menstruation
The shedding of the endometrium in the absence of fertilisation
The menstrual cycle
The lining of the uterus known as the endometrium thickens with blood in preparation for fertilisation
An egg is produced and if not fertilised the endometrium will break down
A new egg will be produced and the cycle continues until fertilisation
Menstruation timeline
Day 1-5: new egg starts to develop
Day 6-13: egg matures and endometrium thickens
Day 14: ovulation
Day 15-28: the uterus lining is maintained
Sexual intercourse
When the penis is placed into the vagina
Birth processes
- Labour - the amnion bursts and he baby is punched towards the vagina by contractions
- Birth - contractions continue and push the baby out of the vagina
- Placenta removal - the placenta is pushed out the uterus and the umbilical cord is cut
