Across
- 5. muscular middle layer of the heart
- 6. inner lining of the heart
- 7. Upper chambers of the heart
- 8. carries oxygenated blood from the left ventricle
- 10. larger chambers of the heart that pump blood out of the body and the lungs
- 12. structures that control blood flow through heart
- 13. blood vessels that supply the heart muscle with oxygen
Down
- 1. outer layer of the heart
- 2. valves between atria and ventricles
- 3. valves between ventricles and arteries
- 4. blood vessels that drain deoxygenated blood from the heart muscle
- 9. A wall of muscle tissue that separates the right and left sides of the heart.
- 11. protective sac around the heart