Circulatory system

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Across
  1. 3. circulation to and from the heart
  2. 6. prevents back flow in veins
  3. 7. pumps the blood
  4. 9. circulation to and from the rest of the body
  5. 10. fight diseases and viruses
  6. 12. connect arteries and veins
  7. 13. exchange gases (takes oxygen and releases CO2)
Down
  1. 1. carry oxygen poor blood to the heart
  2. 2. capillaries, arteries, veins
  3. 4. circulation to and from the lungs
  4. 5. watery substance, carries nutrients
  5. 8. carry oxygen rich blood away from the heart
  6. 11. involved in clotting