Respiratory System - Grade 6

123456789101112131415161718192021222324252627282930313233
Across
  1. 2. Flap that prevents food from entering the trachea
  2. 5. Smallest air passages in the lungs
  3. 8. Disease characterized by damaged alveoli
  4. 9. Process of taking air into the lungs
  5. 12. Gas exhaled during respiration
  6. 14. Infection that inflames air sacs in lungs
  7. 15. Two main branches of the trachea
  8. 16. Tiny air sacs where gas exchange occurs
  9. 19. Respiratory disease caused by allergens
  10. 22. Instrument used to measure lung volume
  11. 23. Process of releasing air from the lungs
  12. 24. Organ that filters, warms, and moistens air
  13. 26. Cavity that houses the lungs
  14. 27. Main passage for air entering the body
  15. 28. Main organ of the respiratory system
  16. 29. Protective structure around the lungs
  17. 31. Maximum amount of air lungs can hold
  18. 33. Tube that connects the throat to the lungs
Down
  1. 1. Tiny blood vessels surrounding alveoli
  2. 3. System that works closely with the respiratory system
  3. 4. Respiratory organ in fish
  4. 6. Condition caused by inflammation of bronchi
  5. 7. Condition caused by lack of oxygen
  6. 10. Amount of air inhaled or exhaled in one breath
  7. 11. Substance that reduces surface tension in alveoli
  8. 13. Term for absence of breathing
  9. 17. Voice box located in the throat
  10. 18. Gas inhaled during respiration
  11. 20. Muscle that helps in breathing by contracting and relaxing
  12. 21. Exchange of gases between blood and air
  13. 25. Membrane surrounding the lungs
  14. 30. Organ that separates chest from abdomen
  15. 32. Passage behind the nose and mouth