Respiratory System

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Across
  1. 2. Bones that surround and protect your lungs and heart
  2. 4. How air goes into your body
  3. 6. its the organ that collects the air
  4. 7. It is found at the end of the trachea and splits the air into each lung
  5. 8. odourless gas produced by burning carbon and organic compounds and by respiration
  6. 9. This is the muscle that is responsible for inflating and deflating the lungs
  7. 11. Its the pipe that sends air to the lungs
Down
  1. 1. movement of molecules from high concentration to low concentration
  2. 3. These are the air sacs that exchange oxygen and carbon dioxide in the blood
  3. 5. air goes inside the lungs so we can breathe
  4. 7. hese are the small air tubes that connect the bronchus to the alveoli
  5. 10. Blood vessels in the alveoli walls that move oxygen and carbon dioxide.