respiratory system

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Across
  1. 3. breathe in
  2. 5. known as the voice box
  3. 6. tiny sac, where gas exchange takes place
  4. 10. caused by inflammation of the air sacs
  5. 11. caused by excess mucus in the body; hereditary
  6. 14. breathe out
  7. 15. structure that aids in breathing
Down
  1. 1. largest of the two lungs
  2. 2. connects the trachea to the lungs
  3. 4. chronic; inflames and narrows bronchial tubes
  4. 7. smallest of the two lungs
  5. 8. leaf-shaped cartilage behind the tongue
  6. 9. main organ of the respiratory system
  7. 10. connects the mouth to the larynx and esophagus
  8. 12. known as the windpipe
  9. 13. filler particles in nose