Respiratory System

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Across
  1. 2. Main "trunk" of the respiratory "tree"
  2. 5. Small hairs that move mucus through lungs
  3. 8. Smaller branches inside lungs
  4. 11. Inhaling
  5. 12. The act of breathing
  6. 13. Where gas exchange occurs
  7. 16. Means pertaining to the lungs
  8. 17. One entry for air
  9. 18. Back of the throat
Down
  1. 1. Exhaling
  2. 3. Protects us from choking on food
  3. 4. Waste gas
  4. 6. Helper muscles for the diaphragm
  5. 7. Main muscle responsible for respiration
  6. 9. Main organ of the Respiratory System
  7. 10. 2 main branches inside lungs
  8. 14. Voice box
  9. 15. Gas needed by all cells