Circulatory System

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Across
  1. 2. SA node
  2. 5. Separates the left and right side of the heart
  3. 6. Valve on the right side of the heart
  4. 9. One of the lymph organs
  5. 11. Main vein into the heart
  6. 12. Platelets
  7. 13. Chamber of the heart
  8. 14. With oxygen
  9. 15. Chamber of the heart
  10. 17. Group of nerve fibres in the septum
  11. 19. Contraction phase of the cardiac cycle
  12. 21. Without oxygen
  13. 22. Section of the double circulatory system
Down
  1. 1. One of the lymph organs
  2. 3. Main artery out of the heart to the body
  3. 4. Section of the double circulatory system
  4. 7. Relaxation phase of the cardiac cycle
  5. 8. Makes up 55% of the blood, allows for transportation of materials other than oxygen
  6. 10. Red blood cell
  7. 16. Valve on the left side of the heart
  8. 18. White blood cell
  9. 20. Prevent backflow