Across
- 2. Removes lactic acid from muscles, carries oxygen and CO2
- 3. Nerve cells use energy to generate these
- 4. When muscles get tired during exercise
- 7. Waste product of respiration
- 8. Needs oxygen
- 9. debt The amount of oxygen needed after exercise
- 10. A product of yeast anaerobic respiration
- 13. Breakdown of food to release energy
- 14. Waste product of anaerobic respiration
- 16. Muscles use energy to do this
- 17. Less of this is released in anaerobic respiration
- 18. Respiration produces this to keep us warm
Down
- 1. Energy needed to build large ones from small ones
- 5. A store of sugar in the muscle cells
- 6. Where respiration happens in a cell
- 8. Does not need oxygen
- 11. The organ which breaks down lactic acid
- 12. Moves gases in and out of the lungs
- 15. Heart rate does this when we run