Biology

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Across
  1. 3. group of organs work together
  2. 6. removes large substances
  3. 9. diffuse through protein doorways
  4. 10. several organs work together
  5. 11. requires energy
  6. 16. moves across protein channels
  7. 17. uses pseudopods
  8. 18. requires no energy
  9. 19. equal amount on both sides
  10. 20. group of cells work together
  11. 21. primary energy
Down
  1. 1. brings substances into the cell
  2. 2. one cell
  3. 4. diffusion of water
  4. 5. two or more tissues work together
  5. 7. diffusion
  6. 8. Many cells
  7. 12. binds to specific sites
  8. 13. fluid dissolve through membrane
  9. 14. most basic unit of any living thing
  10. 15. goes through membrane easily