Across
- 4. The heart continuously pumps this substance throughout the body.
- 5. Tiny openings on plant leaves through which gases like oxygen and carbon dioxide diffuse.
- 7. This plant tissue transports sugar made during photosynthesis from the leaves to other parts.
- 12. The soft spongy tissue inside bones responsible for producing blood cells- Bone _______.
- 13. Arteries carry blood rich in this vital gas to the rest of the body.
- 14. The net movement of particles from a region of higher concentration to a region of lower concentration.
- 15. These blood vessels carry blood away from the heart.
Down
- 1. Oxygen and _________ food move from capillaries into tissue cells.
- 2. A modern farming method used in Singapore to supply vegetables when land is limited.
- 3. This plant tissue transports water and mineral salts from the roots.
- 6. The heart is a small organ with strong _______.
- 8. This muscular organ acts as the pump in the human circulatory system.
- 9. Waste substances and _______ dioxide move out of tissue cells into capillaries.
- 10. These blood vessels carry blood towards the heart.
- 11. The person from whom an organ is removed for transplant.