Across
- 1. Colour of deoxygenated blood
- 6. Thickest blood vessel walls
- 7. Cells that fight infection
- 9. Shape of red blood cells
- 10. Fragments of cells that help clotting
- 11. Oxygen-carrying pigment
- 14. Smallest blood vessels
- 16. Nutrients carried in blood
- 17. Where are blood cells made?
- 18. Main component of plasma
Down
- 2. Cells that carry oxygen
- 3. Colour of oxygenated blood
- 4. Gas removed by blood
- 5. Purpose of valves in veins
- 8. Main liquid part of blood
- 10. Average human resting heartbeat felt in an artery
- 12. Gas picked up in lungs
- 13. Vessels carrying blood to the heart
- 15. Vessels carrying blood away from heart