Across
- 2. number of stages in the cardiac cycle
- 3. relaxation of heart muscles
- 7. coronary artery carries ____ blood
- 8. blood flows to the rest of the body via the ____
- 11. circulation of blood to the lungs
- 12. membrane surrounding the heart
- 13. _____ systole occurs when atria contract
- 15. found between left and right ventricles
Down
- 1. ____ atrium receives oxygenated blood
- 4. ____ vena cava transports deoxygenated blood to the heart
- 5. smooth lining of heart chambers
- 6. lower chambers
- 9. ____ valve closes when deoxygenated blood flows to lungs
- 10. base of the heart
- 14. number of chambers