Across
- 3. the system that circulates blood
- 6. Blood flows in through the heart
- 8. allow blood to flow in one direction
- 9. red fluid inside your body
- 10. breathing
Down
- 1. pumps blood
- 2. dioxide breathe out
- 4. blood flows away from the heart
- 5. breathe it in
- 7. connect veins and arteries