Across
- 3. The movement of particles from high to low concentration.
- 4. The red pigment in blood that carries oxygen.
- 5. dioxide, The gas plants take in during photosynthesis.
- 10. The process of releasing energy from food.
- 11. The largest organ in the human body.
- 13. The control centre of a cell.
- 15. Tiny blood vessels where exchange of gases occurs.
- 16. The green pigment that absorbs light for photosynthesis.
Down
- 1. The process plants use to make food.
- 2. The organ responsible for filtering blood.
- 6. Blood vessels that carry blood away from the heart.
- 7. The basic unit of life.
- 8. The sugar made during photosynthesis.
- 9. The organ that pumps blood around the body.
- 12. The liquid part of blood.
- 14. Tiny air sacs in the lungs.