Respiratory System

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Across
  1. 2. thin lining covering the walls of the lungs
  2. 6. form a protective cage around the lungs and other parts of the chest cavity
  3. 7. the net movement of molecules from a region of higher concentration to a region of lower concentration
  4. 9. when someone breathes in dirty air and bronchial tubes narrow
  5. 10. sending carbon dioxide out of the lungs
  6. 12. diaphragm moves downwards, rib muscles pull ribs up and outwards, pulls air into the lungs causing the lungs to look bigger
  7. 13. part of the digestive system and the respiratory system because it carries air and food
  8. 14. bronchi branched into smaller tubes inside the lungs
  9. 17. place where exchange of oxygen and carbon dioxide actually takes place
  10. 19. at the bottom of the chest cavity that inflates and deflates when someone breathes
  11. 20. chest wall muscles relax, pushes air out of lungs
  12. 21. chest cavity that contains the bronchial tree and other parts of the respiratory system
Down
  1. 1. keeps food and liquid from entering the lungs
  2. 3. allows them to inflate and deflate without loosing their shape
  3. 4. stiff rings contained in the walls of the trachea to keep it open
  4. 5. bringing oxygen into the lungs
  5. 8. windpipe
  6. 11. trachea splits into 2 air tubes that connect to the lungs
  7. 15. protects nasal passageways and other parts of the respiratory tract
  8. 16. breathing is a rhythmic involuntary process regulated by this
  9. 18. contains a voice box that vibrates to make sounds