Across
- 2. – Green pigment in plants.
- 3. – Tiny pores on leaves for gas exchange.
- 5. – A nerve cell that transmits impulses.
- 7. – Smallest blood vessel.
- 9. – Movement of water through a semipermeable membrane.
- 10. – Involuntary and quick response to a stimulus.
- 11. – Jelly-like substance in a cell.
- 13. – Control center of the cell.
- 16. – Powerhouse of the cell.
- 19. – Breakdown of food into simpler substances.
Down
- 1. – Process by which green plants make their food using sunlight.
- 4. – Protein that speeds up chemical reactions.
- 6. – Organ that filters blood and produces urine.
- 8. – Tissue that transports food in plants.
- 10. – Process of breaking down glucose for energy.
- 12. – Loss of water vapor from leaves.
- 14. – Tissue that transports water in plants.
- 15. – Oxygen-carrying pigment in blood.
- 17. – Chemical messenger secreted by glands.
- 18. – Air sacs in the lungs.