1. Same pictures these have labels
Human Reproduction
Same pictures these have labels

2. The female reproductive system
The female reproduction system produces the female gamete (egg) and protects the developing embryo / foetus

3. The male reproductive system
The male reproduction system produces and delivers the male gamete (sperm)
link to interactive diagram at Kid’sHealth
Seminal Vesicle
Sperm Duct
Side view

4. Sperm is made in testes
Travels down sperm duct
Mixed with seminal fluid at prostrate

5. Growth & Puberty Growth is a characteristic of all living things
During puberty the reproductive systems mature
After puberty a human is called an adult
link to animation at bbc.co.uk

6. The menstrual cycle 28 day cycle in the female
link to animation
28 day cycle in the female
Controlled by chemicals called hormones
An egg is produced, and the womb develops a thick lining of blood vessels to be prepared for pregnancy
If the egg is not fertilised, the lining leaves the womb – menstruation – and the cycle begins again

8. Stages in the menstrual cycle
28 day cycle
Approx. days
1 - 5
Menstruation – loss of uterus lining and unfertilised egg
5 - 13
Repair of uterus lining 14
Release of egg from ovary
Build up of lining of uterus

9. Fertile period in the menstrual cycle
The egg is, usually, released around
Day 14 of a 28 day cycle
Fertilisation is possible for several days around this time

10. link to ‘how stuff works’ animation
Sexual intercourse
Millions of sperm are transferred in a fluid called semen…they immediately begin swimming towards the single egg cell
link to ‘how stuff works’ animation

11. Fertilisation
Occurs when a male gamete (sperm) fuses with the female gamete (egg) to form a zygote
Also referred to as conception
Sperm + egg = zygote

12. Fertilisation Fertilisation usually happens in the fallopian tube
A fertilised egg – zygote - then moves down into the wall of the uterus / womb

13. Pregnancy
a zygote undergoes cell division and develops within the womb into a foetus
over 40 weeks the foetus develops all its human features
It develops inside a protective sac of fluid
It receives food via a blood supply in the placenta
link to animation

14. Placenta
Exchange and filter system where embryo gets nutrients from mothers blood without the 2 bloods mixing

15. Birth
Link to birth animation
After about 40 weeks, when the baby is fully developed, the following happens:
The sac of protective fluid breaks open
The muscles of the uterus / womb contract very strongly to push the baby out
After the baby is born, the placenta is also pushed out of the womb
The umbilical cord between baby and placenta is cut
Links to an animation – may be slow to load…

16. Contraception Main methods of preventing conception:
Chemical - prevention of gamete formation e.g. the Pill
Physical barrier – preventing the gametes from meeting e.g. condom
Timing – avoiding sexual intercourse during the fertile period of the menstrual cycle

17. Find the answers:
Why are human babies born so “helpless” compared to some animal babies?
Why are human babies’ heads so big in comparison to their bodies?
What are conjoined twins and how do they occur?
What is foetal alcohol syndrome ?

18. H/W
P84
Q7-10