Respiratory System

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Across
  1. 2. valve preventing food or air
  2. 3. tube parallel to the trachea
  3. 6. infection of the lungs
  4. 9. largest organ in the respiratory system
  5. 10. 2 airways to the lungs
  6. 15. an overnight test of the respiratory
  7. 16. abbreviation of an underwater breathing machine
  8. 18. caused by excessive amounts of phlegm
  9. 19. mucus
Down
  1. 1. small air sacs that exchange carbon monoxide and oxygen
  2. 3. action of releasing air from the respiratory system
  3. 4. voluntary action of inhaling a harmful substance
  4. 5. toxic and odourless gas
  5. 7. adjective of nose
  6. 8. horizontally elongated feature of the face
  7. 11. grippe
  8. 12. study of the respiratory system
  9. 13. sharp and loud expel of air from the lungs
  10. 14. windpipe after the pharynx
  11. 17. Bronchial allergy to proteins