The circulatory system is responsible for circulating blood throughout the body using the heart and blood vessels. The heart pumps blood which carries oxygen and nutrients through arteries and returns deoxygenated blood to the heart through veins. Blood circulation is essential for transporting oxygen and waste between the lungs and body tissues.

1. BLOOD CIRCULATION

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

3. • The circulatory system is responsible for
blood circulation.
• It is made up of the heart and blood
vessels.

4. The heart
• The hart is and organ.
• It pumps the blood around our body.
• Our heart is between the two lungs

5. BLOOD VESSELS
• Blood circulates around our body inside
blood vessels.
• Three types of blood vessels:
-arteries, veins and capillaries.

6. • Arteries carry blood with oxygen.
• Veins : collect blood with carbon dioxyde.
• Capillaries: connect veins and arteries.

7. breathing
• The respiratoriy system is made up of the
following organs:
• Nostrils, trachea, two bronchial tubes and
two lungs.
• Our ribs protect our lungs.

8. • 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.

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

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