The Circulatory System

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Across
  1. 5. the width of capillaries is_______
  2. 7. carries blood to and from the body's cells
  3. 8. produced by white blood cells and can fight infection
  4. 10. carries blood back into the heart
  5. 11. formed in red bone marrow
  6. 12. biggest artery of the body
  7. 13. valves that prevent expelled blood to flow back into the heart
  8. 14. needed for blood clotting
  9. 15. where red blood cells are manufactured in
  10. 16. amount of blood pumped out of the left ventricle each beat
  11. 18. the number of times your heart beats per minute
  12. 19. wall separating the left and right sides of the heart
  13. 20. red coloured compound in red blood cells
  14. 21. amount of blood pumped out of the left ventricle each minute
Down
  1. 1. name for white blood cells
  2. 2. name for red blood cells
  3. 3. method used to increase red blood cell count to enhance athletic performance
  4. 4. blood pumped from the heart to the lungs through the pulmonary artery
  5. 6. blood returned to the heart through the pulmonary vein
  6. 9. calculated using 220 minutes your age
  7. 12. carries blood away from the heart
  8. 17. the result of Haemoglobin bonding with oxygen