Across
- 2. this happens in your lungs
- 4. Tiny pieces of cells
- 6. How do substances move in and out of cells?
- 7. it is used in short bursts of vigorous exercise
- 9. _________carry blood to cells
- 13. tubes from the trachea leading to your lungs
- 14. when muscles in your airway contract, this causes ______.
- 15. where gas exchange takes place
- 16. breathing takes oxygen in and removing waste _______.
- 17. what do red blood cells transport?
- 18. these movements reduce the volume in your lungs
- 19. sheet of muscle which your chest protects from the rest of the organs
- 20. one alveolus is surrounded by a network of blood vessels called?
Down
- 1. what kind of acid does Anaerobic Respiration produce?
- 3. people use _________ in case of an asthma attack.
- 5. Some white blood cells make special proteins called______.
- 8. takes place is specialised structures in cells called ______?
- 10. process in which oxygen is needed to break down food molecules
- 11. what kind of muscles contract when you breathe in?
- 12. moves air in and out of your lungs