Across
- 4. blood vessel that carry blood away from heart
- 6. carrier of oxygen
- 7. the smallest blood vessel
- 8. blood vessel that carry blood towards the heart
- 10. state when muscles tighten
- 11. protein in red blood cells
Down
- 1. useful when blood clots
- 2. heart valves that receive blood
- 3. defender of our body
- 5. state when the muscles relax
- 9. heart valves that carry blood out of heart