Across
- 2. artery wall thickness
- 5. another word for lung
- 6. blood that contains a lot of O2
- 7. vein wall thickness
- 10. the blood vessel that carries blood away from the heart
- 11. color of oxygenated blood
- 12. the blood vessel that carries blood to the heart with valves
Down
- 1. the blood vessel that is one cell layer thick and exchanges materials
- 3. color of deoxygenated blood
- 4. blood that contains a lot of CO2 and little O2
- 8. the organ that pumps blood throughout the body
- 9. another word for the body
- 12. structure that allows blood to flow in one direction