The Respiratory System

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Across
  1. 3. Waste gas that we breathe out
  2. 7. Cartilage that holds the vocal cords
  3. 9. Cleans the air we breathe
Down
  1. 1. A passageway for food and air
  2. 2. Two tubes that carry air into the lungs
  3. 4. Branch off from the Bronchi
  4. 5. Takes in the air we need to live
  5. 6. The main organ of the respiratory system
  6. 8. Allows gas to exchange in the lungs