Cells and systems

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Across
  1. 3. lets things in and out of the cell
  2. 8. system that pumps blood around
  3. 12. substances randomly move from a high concentration to a low one
  4. 13. smooth tissue that reduces friction between the ends of bone
  5. 15. sweep mucus out of airway
  6. 16. one cell big
  7. 17. on root cell has large surface area for absorption of water
  8. 18. controls what happens and inheritance in a cell
  9. 19. where respiration takes place in a cell
Down
  1. 1. supports, protects, allows movement and produces blood cells
  2. 2. takes the full weight of the body
  3. 4. cells that have dendrites (branches) to communicate with other cells.
  4. 5. addictive drug in cigarettes that increases heart rate and blood pressure.
  5. 6. shape of red blood cell to have a large surface area to absorb oxygen
  6. 7. tie bones to muscle
  7. 9. muscles work by one contracting and the other relaxing
  8. 10. where photosynthesis takes place in a cell
  9. 11. link bones
  10. 14. system that takes in oxygen and removes carbon dioxide