1. BLOOD CIRCULATION

2. BLOOD
• Blood is a very important liquid.
• It carries oxigen and the substances from
digestion to different parts of our body.
• The journey of the blood around our body
is called circulation.

3. • The circulatory system is reponsible for
blood circulation.
• It is made up of the heart and the blood
vessels.
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4. THE HEART.
• The heart is an organ.
• It pumps the blood around our body.
• Our heart is between the two lungs.

5. BLOOD VESSELS
• Blood ciculates around our body inside
blood vessels.
• There are three types of blood vessels:
arteries, veins, capillaries.

6. - Arteries carry the blood with oxygen.
- Veins collect blood with carbon dioxide.
- Capillaries connect veins and arteries.

7. BREATHING
The respiratory system is made up of the
following organs:
nostrils, trachea, two bronchial tubes and
two lungs.
Our ribs protect our lungs.

8. • Oxygen from the air passes through the
walls of our lungs into our blood.

9. Air enters our body through the nose and
mouth.
It passes through the nostrils. It goes down
through the trachea and the bronchial
tubes, and into the lungs.

10. • We make two movements: inhalation and
exhalation.
• When we inhale, our lungs fill with air.
• When we exhale, air leaves our lungs.