Respiratory System GCSE PE (Edexcel)

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