Respiration and gas exchange

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Across
  1. 2. Addictive drug in tobacco smoke
  2. 4. Produced by aerobic respiration
  3. 8. gas produced by aerobic respiration
  4. 9. Respiration without oxygen
  5. 12. Name for anaerobic respiration in yeast
  6. 15. Produced by fermentation, used to make alcohol
  7. 17. Organ system which allows you to breath
  8. 18. Produced by anaerobic respiraton, it causes muscle cramps
Down
  1. 1. Gas needed for aerobic respiration
  2. 3. poisomous gas produced by smoking
  3. 5. Sugar needed for respiration
  4. 6. Chemical reaction performed by cells to release energy
  5. 7. Microorganism used in brewing and baking
  6. 10. tiny air sacs in the lungs
  7. 11. Sticky black substance produced by smoking
  8. 13. Diseased caused by smoking it stops alveoli from expanding
  9. 14. Type of smoking where you inhale other peoples smoke
  10. 16. liquid which transports oxygen and glucose