Circulatory System

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Across
  1. 3. blood vessel.
  2. 5. blood clot.
  3. 7. component of blood.
  4. 10. inorganic element in blood.
  5. 13. measurement of heart activity.
  6. 17. heart valve.
  7. 18. influence of carbon dioxide concentration on heart rate.
  8. 19. carry deoxygenated blood.
Down
  1. 1. when heart is relaxed.
  2. 2. carry blood away from heart.
  3. 3. supply blood to heart.
  4. 4. cardiac muscle in short oxygen supply.
  5. 6. Scientist who demonstrated the one-way action of valves.
  6. 8. vein that does not meet up with the vena cava.
  7. 9. circulatory system in humans.
  8. 11. involved in blood clotting.
  9. 12. controls heart beat.
  10. 14. white blood cell.
  11. 15. left atrium receives from.
  12. 16. heart muscle.