Respiratory System

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