Blood 11

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Blood 11

  1. 1. BLOOD CIRCULATION
  2. 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. 3. • The circulatory system is reponsible for blood circulation. • It is made up of the heart and the blood vessels. •
  4. 4. THE HEART. • The heart is an organ. • It pumps the blood around our body. • Our heart is between the two lungs.
  5. 5. BLOOD VESSELS • Blood ciculates around our body inside blood vessels. • There are three types of blood vessels: arteries, veins, capillaries.
  6. 6. - Arteries carry the blood with oxygen. - Veins collect blood with carbon dioxide. - Capillaries connect veins and arteries.
  7. 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. 8. • Oxygen from the air passes through the walls of our lungs into our blood.
  9. 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. 10. • We make two movements: inhalation and exhalation. • When we inhale, our lungs fill with air. • When we exhale, air leaves our lungs.

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