IB Blood System

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Across
  1. 2. Narrowing of the coronary arteries
  2. 3. Waste product transported in the blood
  3. 5. Create the heart sounds as they close
  4. 7. Bundles of nerves in the septum
  5. 8. Platelet
  6. 9. Refers to the fact that the cardiac cycle is controlled from within the heart muscle
  7. 11. Space through which blood flows
  8. 12. Sino-atrial node
  9. 13. Transports carbon dioxide
  10. 14. Prevented by valves
  11. 15. Protein that makes arteries stretchy
  12. 18. Red blood cell
  13. 21. Membrane surrounding capillaries
  14. 23. Upper chambers of the heart
  15. 24. Blood vessels with valves
  16. 25. Separates oxygenated and deoxygenated blood in the heart
  17. 26. Circulation to and from the lungs
  18. 27. Showed that blood circulated
  19. 28. fibres that spread the electric impulse through the ventricles
Down
  1. 1. White blood cells
  2. 2. Valves in the heart
  3. 4. Traces the electrical signals through the heart.
  4. 6. Smallest blood vessels
  5. 7. Transported in the blood
  6. 10. Protein that makes arteries strong
  7. 13. Bacteria engulfing cell
  8. 16. Transports blood away from the heart under very high pressure
  9. 17. Ventricle with a thicker wall
  10. 19. Increases the heart rate
  11. 20. Can be felt in arteries but not veins
  12. 22. Circulation around the body