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