Respiratory System

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Across
  1. 5. The main muscle used for breathing
  2. 8. Condition characterized by narrowed airways and wheezing
  3. 9. Flap of tissue that prevents food from entering the trachea
  4. 11. The process of drawing air into the lungs
  5. 13. Sticky fluid that traps pathogens and debris
  6. 14. The "voice box" containing vocal cords
  7. 16. Waste gas exhaled during respiration
  8. 18. Smallest branches of the bronchial tubes
  9. 20. Bony structure protecting the lungs
  10. 21. Major organs of the respiratory system
  11. 24. The physical act of moving air in and out
  12. 25. Blood vessels where gas exchange takes place
Down
  1. 1. Chemical process of releasing energy within cells
  2. 2. Red blood cell protein that carries oxygen
  3. 3. The process of releasing air from the lungs
  4. 4. Cavities in the skull that warm and moisten air
  5. 6. Throat area where the nasal and oral cavities meet
  6. 7. Tiny air sacs where gas exchange occurs
  7. 10. Thin membrane covering the lungs and lining the chest cavity
  8. 12. Gas required by cells for energy production
  9. 15. Hair-like structures that filter dust and move mucus
  10. 17. The two main branches off the trachea
  11. 19. The sense associated with the upper respiratory tract
  12. 22. External openings of the nose
  13. 23. Windpipe that connects the larynx to the bronchi