Across
- 4. respiration without oxygen
- 6. gas needed for aerobic respiration
- 9. respiration that uses oxygen
- 10. part of the body that works during exercise
- 11. process that releases energy from glucose
- 13. physical activity that increases respiration
Down
- 1. chemical that builds up in muscles when tired
- 2. waste gas produced in respiration
- 3. pain in your muscle after exercise
- 5. how we take in oxygen and remove carbon dioxide
- 7. sugar used in respiration
- 8. organ that beats in your body
- 12. what cells release during respiration