tema 2

1. natural

2. Digestive system
• Mouth
• Food is broken up by the teeth and mixed with saliva by the
tongue.

3. • Esophagus
• Food goes down this tube to the stomach.

4. • Stomach
• Gastric juices make the food into a thick liquid.

5. • Small intestine
• There are lots of blood vessels. Nutrients pass into the blood.

6. • Large intestine
• The waste passes through. Water goes out into the body and
the waste becomes harder.

7. • Anus
• The waste, called faeces, leaves the body.

8. Can you name the parts of the digestive system?
Mouth
Food is broken up by the teeth
and mixed with saliva by the
tongue.
Small intestine
There are lots of blood
vessels. Nutrients pass
into the blood.
Anus
The waste, called faeces,
leaves the body.
Esophagus
Food goes down this tube
to the stomach.
Stomach
Gastric juices make
the food into a thick
liquid.
Large intestine
The waste passes through.
Water goes out into the
body and the waste
becomes harder.

9. Excretory system

10. • Kidneys
• When the blood goes through here, excess water and waste
products are dropped off and made into urine.

11. • Ureters
• The urine goes down these tubes to the bladder.

12. • Bladder
• The urine is stored here. When it is full it sends a message to
our brain.

13. • Urethra
• The urine leaves the body through this tube.

14. Can you label the parts of the digestive system?
Kidneys
When the blood goes
through here, excess
water and waste products
are dropped off and made
into urine.
Ureters
The urine goes down these
tubes to the bladder.
Urethra
The urine leaves the
body through this
tube.
Bladder
The urine is stored here.
When it is full it sends a
message to our brain.

15. Circulatory system
• Veins
• They return the blood (with waste) back to the heart.

16. • Arteries
• They carry blood (with oxygen) from the heart to the rest of our
bodies.

17. heart

18. What’s the difference between veins and arteries?
Veins
They return the blood
(with waste) back to
the heart.
Arteries
They carry blood (with
oxygen) from the
heart to the rest of
our bodies.
What do you think
the one-way valves
are for?
They prevent the
blood from going in
the opposite
direction!

19. Do you know where does oxygen pass to and
from the blood?
At the alveoli, through the
capillaries!

20. Can you order this sequence?
3 1 2

21. What happened to the cat?
Its nervous and locomotor systems were in action!
1. He saw a dog.
2. Its eyes sent a message
to its brain.
3. Its brain sent an order
to its locomotor system.
4. It ran away!

22. From egg to baby
1 An egg is fertilised by a sperm.

23. From egg to baby
2 The egg divides again and again and becomes attached
to the wall of the uterus.

24. From egg to baby
3
An embryo develops. At six weeks old it is about the size of a
small seed. Nutrients and oxygen travel from the mother to
the embryo along the umbilical cord.

25. From egg to baby
4 The embryo becomes a fetus at nine weeks. It’s about the size of
an olive. It has arms and legs and it starts to have a face.

26. From egg to baby
5
At three months it has all its organs. It’s about the size of an
avocado.

27. From egg to baby
6 At nine months it is ready to be born… is it a boy or a girl?

28. From egg to baby
7 The baby moves headfirst down the vagina and comes out into the world.
It is born. The umbilical cord is cut and becomes the belly button and the
baby breathes on its own and gets nutrients from its mother’s milk.

29. Can you label the female reproductive system?
ovaries
fallopian tubes
uterus
vagina

30. Can you label the male reproductive system?
penis
testicles
urethra