Azraf’s work

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