Biology
Across
- 4. fight infection and stop disease
- 5. site for respiration in a cell
- 7. produce antibodies that stick pathogens
- 8. waste product of respiration
- 14. movement down its concentration gradient
- 15. flexible layer surrounding the cell
- 16. respiration organ
- 17. broken down part of cells
- 18. carries blood cells and platelets
- 19. food substance for energy
- 20. diffusion of water
Down
- 1. surround, engulf and destroy pathogens
- 2. cells that carry oxygen
- 3. where blood cells and platelets are made
- 6. shape of red blood cell
- 9. contains genetic material of organism
- 10. element needed for respiration
- 11. red pigment that binds with oxygen
- 12. device used to see cells
- 13. liquid that makes up most of the cell