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