Fat child

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Across
  1. 4. reaction it can explode
  2. 7. it can very powerful
  3. 8. you breathe it
  4. 11. acids building protein
  5. 13. something that is to support a claim
  6. 14. something that makes things work
  7. 15. dioxide oxygen and what?
  8. 16. it makes you healthy
  9. 18. respiration energy released into cells
Down
  1. 1. system part of the body to make you breath
  2. 2. can join together
  3. 3. something behind something
  4. 5. system it can transport cells into the body
  5. 6. argument to make a argument
  6. 9. glucose molecules connected together
  7. 10. system takes food in it can break it down
  8. 12. to make you grow
  9. 17. something to realise something
  10. 18. something about the nature world