Across
- 3. Place where nutrients enter the blood
- 8. Waste gas that travels back to heart
- 10. The heart, blood, and vessels
- 11. Blood vessels that are thick
- 12. When blood enters the lung it becomes
Down
- 1. The heart ____ blood
- 2. The Circulatory system ____ nutrients, gases
- 4. Type of surgery to treat blocked artery
- 5. The biggest vessel in the body
- 6. This blood has a lot of CO2
- 7. The pump in the circulatory system
- 9. Blood vessels that have valves