Respiratory System GCSE PE (Edexcel)
Across
- 2. The exchange of gases occurs between the alveoli and blood in the capillaries that supply the lungs.
- 9. A muscle which contracts and flattens during inspiration to make more space for air. During expiration it relaxes to force air out of the lungs.
- 10. The maximum amount of air the lungs can expire after the maximum amount they can inspire.
- 11. This gas makes up for 78% of the air we breathe in and out per breath.
- 13. The amount of air inspired and expired with each normal breath.
- 14. The bronchi sub divide into these which carry the air from the bronchi to the alveoli.
- 17. These allow movement of air in and out of the body through inspiration and expiration.
- 18. This gas makes up 0.04% of the air we breathe in and 4% of the air we breathe out per breath.
- 20. Breathing out.
Down
- 1. How 'deeply' you breath in and out in a single breath.
- 3. To breath out.
- 4. A temporary oxygen shortage in the body tissues arising from exercise.
- 5. Respiration which uses oxygen for energy production.
- 6. The number of breaths per minute.
- 7. The air travels to the lungs through these.
- 8. These are tiny air sacs that exchange oxygen for carbon dioxide.
- 12. The nature of something's ingredients or constituents; the way in which a whole or mixture is made up.
- 15. This gas makes up 21% of the air we breathe in and 16% of the air we breathe out per breath.
- 16. To breath in.
- 19. Breathing in.