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Blood circulation.8

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  • 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.