Respiratory System

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Across
  1. 4. Largest air tubes after trachea
  2. 6. The protein in red blood cells that carries oxygen
  3. 7. Tube connecting larynx to bronchi
  4. 10. What organ do we use to breathe
  5. 11. What part of the nose filters the air we breathe
  6. 16. The term for the tiny blood vessels surrounding alveoli
  7. 17. Tiny hair like structures that help clean the airways
  8. 18. What protects the lungs in the chest
  9. 19. What gas do we exhale
  10. 20. What do we inhale from the air
Down
  1. 1. Disease marked by airway inflammation and wheezing
  2. 2. Membrane that lines the thoracic cavity
  3. 3. Voice box
  4. 5. External opening for air entry
  5. 8. Main site of gas exchange in the lungs
  6. 9. Protective fluid between pleura layers
  7. 12. The thin flap that covers the trachea during swallowing
  8. 13. Main muscle involved in inhalation
  9. 14. Functional zone where gas exchange occurs
  10. 15. Process of taking air into the lungs