blood crossword

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Across
  1. 2. carry blood away from the heart
  2. 4. cells that carry oxygen
  3. 10. protein that binds oxygen in blood
  4. 12. Approximate litres of blood in the body
  5. 13. 55% of blood is made of this
Down
  1. 1. vessels where gas exchange occurs
  2. 3. maximum oxygen molecules bound to protein in red blood cell
  3. 5. deoxygenated blood carries this waste gas
  4. 6. dysfunction of thrombocytes
  5. 7. carry blood to the heart
  6. 8. this cell is responsible for clotting
  7. 9. electrical system that helps the heart pump blood
  8. 11. cell responsible for fighting infection