The document describes the circulatory system and its key components. It explains that the circulatory system consists of blood vessels, blood, and the heart. It details the three types of blood vessels - arteries, veins, and capillaries. The heart is divided into four chambers - two atria and two ventricles. Blood transports oxygen, nutrients, carbon dioxide and waste. Maintaining a healthy circulatory system requires regular exercise, a healthy diet, avoiding smoking and maintaining a healthy weight.

1. Unit 3(c): The circulatory
system.

2. Unit 3(c): The circulatory system.
Index.
1. New words
2. The circulatory system .
3. Parts of the circulatory system.
4. Healthy habits.
5. Experiment
6. Activities.

3. Unit 3(b): Human body.
1. New words.
•Blood vessels•Arteries•Veins•Chambers•Capillaries•the pulses•Blood pressure•Heart beat rate•Restrug•Disorder•Hollow•Fist•Atrium•Ventricle-
Vasos sanguíneos
arterias
venas
compartimentos
capilares
pulsaciones
tensión arterial
tasa de pulsaciones
descansando
alteraciones, enfermedades
hueco
puño
aurícula
ventrículo

4. Unit 3(b): Human body.
2-º The Circuylatory system.
The circulatory system.
CIRCULATION consists of
transporting nutrients, oxygen
and residues
around the body

5. Unit 3(b): Human body.
3. The Circulatory system.
The circulatory System
consists of:
•Blood vessels
•Blood
•Heart

6. Unit 3(b): Human body.
1. The Circuylatory system.

7. BLOOD VESSELS
• Blood vessels are
the conducts
through which
the blood
circulates,
pushed by the
heart.

8. THERE ARE THREE TYPES
• VEINS: they transport the blood
from the organs to the heart.
• ARTERIES: they transport the blood from
the heart to the organs.
• CAPILLARIES: They are very small vessels
that connect the veins and arteries and
reach all the cells in our body.

9. THERE ARE THREE TYPES
• VEINS are thinner than arteries
• ARTERIES are the thickest
• CAPILLARIES are the thinnest

11. • Veins are blue
because they
are carrying
the darker
blood without
oxygen back to
heart.

12. • Arteries have
oxygenated blood
that is bright red
colour.

13. Gas Exchange Occurs,
The oxygen and CO2 are exchanged…in the
cells
Oxygen Rich
Tissue
Oxygen Poor
Oxygen Rich
Oxygen Poor
Now lets go back to the heart!!!

14. The Human Heart
The first person to describe circulation as
we know it today was Dr. William Harvey

15. THE HEART
The heart
is a hollow
organ
made of
muscle.

16. The heart is placed in the chest, a
little to the left side.
In the adult it weighs 300 grs and
it is about the size of a fist.

17. It is divided into two unconnected parts
the right and left.
Each part is also divided into two:
• The upper part is THE ATRIUM
• The lower part is THE VENTRICLE
• The atrium and the
ventricle are connected
by a valve.

20. The blood.
In an
adult s body
there are
about five
litres of
blood.

21. Blood is a thick, red liquid composed of:
BLOOD COMPOSITION

22. Plasma
Platelets
White blood
cells
Red blood cells
Whole Blood Sample
Sample Placed in Centrifuge
Blood Sample That Has
Been Centrifuged

23. Plasma is water with
PLASMA
different substances
dissolved in it.
It transports the
nutrients and the
residues.

24. BLOOD CELLS
There are three types:
RED BLOOD CELLS: give blood
its colour and transport
oxygen and carbon dioxide.

25. WHITE BLOOD CELLS: protect
us and defend us from
infections.

26. PLATELETS:
block our
wounds so
we do not
lose too
much blood.
Break in Capillary Clumping of
Wall
Platelets
Clot Forms

27. THE FUNCTIONS OF THE BLOOD
*Blood transports nutrients and oxygen to
the cells and take away the residues to
where they are eliminated.
*It also defends our body from
infections.

28. Your Heart: The Vital Pump
• At REST, the heart pumps at
70 beats a minute. It is usually
faster in children.
• During exercise it may
increase to double the resting
rate.
• Also emotions and illnesses
may cause the heart to beat
faster.

29. What are the pulses?
In certain places, at the wrists, in the neck
on the temples, arteries are near the
surface and cen be felt easily.
Doctors take the pulses to know the
regularity of the heart.

30. What is blood pressure?
It is the pressure of blood in the
arteries which can be too high or to
low in some diseases.
A normal blood pressure is 120/80

31. Blood Types
Massive loss of blood requires a transfusion
Four Types
A
B
AB
O
Inherited from your parents

32. Blood Types

33. What Makes Our Blood Type?

34. Blood Transfusions
Blood Type of
Donor
Blood Type of Recipient
A
B
AB
O
A
B
AB
O
Unsuccessful transfusion
Successful transfusion

36. LUNGS

37. The CirculatorySystem.
Healthy habits

38. Current PREVENTION
Recommendations
Regular
exercise

39. Weight control

40. Well balanced diet

41. Do not eat too much
junk food
It contains
cholesterol, a fat
that collects in our
blood vessels and
blocks them.

42. Do not smoke

43. Summary
Healthy Habits
•
•
•
•
•
Regular exercise
Weight control
Well balanced diet
Do not eat too much junk food
Do not smoke