Respiratory System

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Across
  1. 3. The process of taking in oxygen and releasing carbon dioxide.
  2. 6. The space inside the nose that warms and filters air.
  3. 7. The two main air passages that carry air into the lungs.
  4. 9. A sticky substance that traps dust and germs in the airways.
  5. 11. The two main organs used for breathing.
  6. 12. A thin membrane that surrounds and protects the lungs.
  7. 15. The movement of air into and out of the lungs.
  8. 18. A waste gas removed from the body when you breathe out.
  9. 19. The process of breathing air into the lungs.
Down
  1. 1. A flap of tissue that prevents food from entering the airway.
  2. 2. Small branches of the bronchi that lead to the alveoli.
  3. 4. The process of breathing air out of the lungs.
  4. 5. The process of swapping oxygen and carbon dioxide in the lungs.
  5. 8. A gas the body needs to produce energy.
  6. 10. The voice box located between the throat and the trachea.
  7. 13. A tiny air sac in the lungs where oxygen and carbon dioxide are exchanged.
  8. 14. A large muscle below the lungs that helps you breathe.
  9. 15. Folds of tissue in the larynx that produce sound when air passes through.
  10. 16. The tube that carries air from the throat to the lungs.
  11. 17. The throat passage that connects the nose and mouth to the airway.