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