The Respiratory System

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Across
  1. 2. Poisonous.
  2. 4. Pair of breathing organs located in the chest.
  3. 6. Infectious and inflammatory lung disease.
  4. 9. Disease often caused by smoking.
  5. 10. Another name for the windpipe.
  6. 11. Airway between the throat and the lungs.
  7. 12. Good air.
Down
  1. 1. To breathe air out.
  2. 3. Disease often caused by an allergy.
  3. 5. Organ of the human respiratory system that air enters.
  4. 7. Process in which our cells use oxygen and sugar to produce energy.
  5. 8. To breathe air in.