Across
- 1. blood vessel that takes blood to the body
- 6. the smallest blood vessel
- 8. bottom chamber of the heart
- 9. what can be fitted to widen an artery
- 10. top chamber of the heart
Down
- 2. what the blood becomes when it reaches the lungs
- 3. what tissue the heart is made of
- 4. number of chambers the heart has
- 5. prevents blood flowing backwards
- 7. blood vessel with the thickest walls
- 8. blood vessel with valves