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6. What is it called when blood goes through the heart twice

  • death
  • double circulation
  • dinner time
  • once circulation

7. what direction does blood flow in an artery

  • downwards
  • into space
  • away from the heart
  • upwards

8. what colour is DEoxygenated blood

  • HOLO
  • purple
  • blue
  • red

9. how thick is a capillary

  • two cells
  • one cell
  • 20 cells
  • its too small to fit any