Respiratory System

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Across
  1. 2. “wind pipe” that contains cartilage rings.
  2. 5. the main organ of the respiratory system.
  3. 6. disease that progressively destroys the walls of alveoli; usually caused by smoking.
  4. 8. “voice box”
  5. 9. external nasal openings.
  6. 10. keeps food out of lungs.
Down
  1. 1. sheet of muscle below the lungs.
  2. 3. air sacs of the lung.
  3. 4. a chronic lung disease that inflames and narrows the bronchial tubes.
  4. 7. disease caused by the inflammation of air sacs in the lungs.