Circulatory System

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Across
  1. 2. Stops you bleeding.
  2. 4. Arteries go in what direction?
  3. 5. The arteries that supply the heart with oxygen.
  4. 7. An open space in a building.
  5. 9. Different way of saying circulatory.
  6. 12. The two at the bottom.
  7. 13. The vein and artery that are wrong.
  8. 15. Blue blood.
  9. 16. Three parts.
  10. 18. Two parts.
  11. 19. The center-piece.
Down
  1. 1. The largest of its kind.
  2. 3. Red blood.
  3. 5. Policing the heart.
  4. 6. Not enough iron in the blood.
  5. 8. Big and scared of the heart.
  6. 10. Creator of Steam (gaming platform, not heated water).
  7. 11. Thicker than its opposite.
  8. 12. Towards the heart.
  9. 14. How many hearts do you have?
  10. 17. Partly moon.