The Respiratory System

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