Respiration

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Across
  1. 6. C-shaped cartilage
  2. 8. cells _______ to get energy
  3. 9. this muscle contracts and moves the ribs upwards and outwards during inhalation
  4. 10. i help protect the lungs
  5. 12. adaptation: has a large surface area
  6. 13. oxygen involved
  7. 15. oxygen + ________ --- carbon dioxide + water + ATP
  8. 17. a chemical process taking place in all cells
  9. 18. contracts and moves downwards during inhalation
Down
  1. 1. protection from germs
  2. 2. decreases in size of the chest and increases of air pressure in chest
  3. 3. a system that allows us to breathe in air
  4. 4. is this living or non living?
  5. 5. one cell thick
  6. 7. prevents airways collapsing
  7. 11. pre-alveolus structure
  8. 14. gas exchange
  9. 16. voice