Cardiovascular System

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Across
  1. 2. heart muscle
  2. 3. sac- membrane
  3. 9. Coronary veins
  4. 10. transfer fresh oxygen
  5. 11. upper chambers
  6. 12. small vessels
  7. 14. white blood cells
  8. 15. inner layer
Down
  1. 1. large vein
  2. 4. red blood cells
  3. 5. poor oxygen
  4. 6. lower chambers
  5. 7. Platelets
  6. 8. heart wall
  7. 13. rich oxygen