What cells do

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Across
  1. 5. Basic unit of all living things
  2. 6. A living thing
  3. 7. The cell structure in which respiration occurs
  4. 10. Group of tissues working together
  5. 12. Required for photosynthesis
  6. 14. Group of organisms of the same species
  7. 16. Goes milky in the presence of carbon dioxide
  8. 18. The breakdown of food into small particles so that it can enter the blood
  9. 21. Group of organs working together
Down
  1. 1. This is released during respiration
  2. 2. Green chemical used to trap sunlight in plant cells
  3. 3. Liquid used to transport food, oxygen and waste around the body.
  4. 4. The cells structure in which photosynthesis occurs
  5. 8. The release the energy from food
  6. 9. One of the waste products of respiration
  7. 11. Food produced during photosynthesis
  8. 13. The movement of oxygen from the blood into the cells
  9. 15. Gas produced during photosynthesis
  10. 17. Energy is released from this during respiration
  11. 19. A substance found in living things that speeds up chemical reactions
  12. 20. Group of similar cells with a specific task