Across
- 2. These produce proteins.
- 4. This is an organ system that involves the lungs.
- 5. These stop the blood from flowing the wrong way.
- 7. This is where photosynthesis occurs.
- 8. This pumps blood around the body.
- 10. This is where gas exchange occurs.
Down
- 1. This filters the blood.
- 3. These are blood vessels that are one cell thick.
- 5. These carry the blood towards the heart.
- 6. This is where water and sap is stored.
- 9. These are made up of specialised cells working together.