The document is about the human reproductive system and process. It contains the following key points: - Humans use sexual reproduction to produce offspring, which requires both male and female sex organs and sex cells. - In females, eggs are produced in the ovaries and in males sperm is produced in the testes. - Fertilization occurs when the sperm and egg meet during sexual intercourse, joining their nuclei. - The fertilized egg implants in the uterus and forms the placenta, which exchanges gases and nutrients between the mother and developing fetus.

1. © Boardworks Ltd 2003

2. © Boardworks Ltd 2003
A slide contains teacher’s notes wherever this icon is
displayed -
To access these notes go to ‘Notes Page View’
(PowerPoint 97) or ‘Normal View’ (PowerPoint 2000).
Normal ViewNotes Page View
Teacher’s Notes
Flash Files
A flash file has been embedded into the PowerPoint
slide wherever this icon is displayed –
These files are not editable.

3. © Boardworks Ltd 2003
Human Reproduction
Humans use sexual reproduction to produce their young.
In order to do this the two parents have to have sex
organs so that they can produce sex cells.
In humans, males and females have different reproductive
systems and sex organs
Go to the activity on the next page to see how much you
know.

4. © Boardworks Ltd 2003
The next slide shows the names of eight different
parts of the male and female human reproductive
systems.
Drag a name to the correct column depending on
whether you think that this is part of the male system or
part of the female system.
Male or Female

5. © Boardworks Ltd 2003
Male or Female

6. © Boardworks Ltd 2003
The Male Reproductive System

7. © Boardworks Ltd 2003
The Female Reproductive System

8. © Boardworks Ltd 2003
Reproductive System

9. © Boardworks Ltd 2003
Sex cells - Sperm
In males the sex cells are called sperm.
Sperm are produced in sex organs called testes.

10. © Boardworks Ltd 2003
Sex cells - Eggs
In females the sex cells are called eggs.
Eggs are produced in sex organs called ovaries.
Nucleus
containing
chromosomes
cytoplasm
membrane
jelly coat
An egg is so big that this is how
big a sperm looks next to it.

11. © Boardworks Ltd 2003
Sperm or Egg?
Both sperm and eggs have special features that makes
it possible for them to carry out their jobs.
Look at the statements on the next page and decide
which one you think belongs to an egg and which one
belongs to a sperm. Once you think you know push the
buttons to see if you are right.

12. © Boardworks Ltd 2003
Sperm or Egg?

13. © Boardworks Ltd 2003
Ovulation and Fertilisation
In the female one of the ovaries produces an egg
every 28 days.
This is called ovulation.
During sexual intercourse sperm is ejaculated into
the vagina.
If the sperm and egg meet the sperms nucleus will
join with the eggs nucleus.
This is called fertilisation.

14. © Boardworks Ltd 2003
Fertilisation and Implantation

15. © Boardworks Ltd 2003
Word Check

16. © Boardworks Ltd 2003
The Placenta
It forms a plate-like structure called the placenta.
The umbilical cord joins the fetus to the placenta.
In the placenta food and oxygen diffuse from the
mothers blood into the blood of the fetus.
Carbon dioxide and waste products diffuse from
the blood of the fetus to the mothers blood.
How does the embryo get food and oxygen and
how does it get rid of waste?

17. © Boardworks Ltd 2003
The Placenta

18. © Boardworks Ltd 2003
The Embryo

19. © Boardworks Ltd 2003
Embryo Development

20. © Boardworks Ltd 2003
Embryo Development
In one of these images the developing baby is
called an embryo.
Which one is it?
What name is given to the other five developing
babies?

21. © Boardworks Ltd 2003
Birth

22. © Boardworks Ltd 2003
Puberty
Human children are born with a complete set of sex
organs. However they do not become active until later in
life.
Between 10 and 18 the testes start to make sperm and
the ovaries start to make eggs.
This time of development in their life is called PUBERTY.
As well as these changes other changes may also occur.

23. © Boardworks Ltd 2003
Puberty in Girls

24. © Boardworks Ltd 2003
Puberty in Boys

25. © Boardworks Ltd 2003
One change that happens to girls at puberty is that they
start to undergo a monthly cycle called the menstrual
cycle.
This cycle is a process where the uterus lining builds up to
receive a fertilised egg.
If an egg is not fertilised then the lining of the uterus
breaks down and is lost from the body. This is called
menstruation or a period.
Menstruation

26. © Boardworks Ltd 2003
The Menstrual Cycle