The Circulatory System

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Across
  1. 3. muscular pump
  2. 4. fluid part of blood
  3. 5. red liquid
  4. 6. carry blood to the heart
  5. 8. the upper chambers of the heart
  6. 9. fight infection
  7. 10. helps to clot blood
  8. 11. carry blood away
Down
  1. 1. tiny blood vessels
  2. 2. the valve that prevents back flow between left chambers of the heart
  3. 3. red pigment in blood cells
  4. 6. lower chambers of the heart
  5. 7. the body's transport system