Across
- 3. There's five liters of it in the human body
- 5. the organ that pumps blood
- 7. connect veins and arteries
- 8. carry blood to the heart
- 9. Take in oxygen and let out carbon dioxide
- 10. carry blood away from the heart
Down
- 1. The tubes that have blood in them
- 2. Main cause of heart attacks
- 4. When you have an irregular heart beat
- 6. Lets blood only flow one way