Across
- 2. Muscular middle layer of the heart wall
- 3. Contraction phase of the cardiac cycle
- 5. Tendinous cords preventing AV valve prolapse
- 10. Swelling caused by fluid retention
- 13. Upper chamber of the heart
- 15. Lower chamber of the heart
- 16. Reduced blood flow to tissues
- 17. Cluster of pacemaker cells in a conduction system
- 19. Smooth inner lining of the heart
- 20. Outer layer of the heart wall
Down
- 1. Abnormally rapid heart rate
- 4. Largest artery carrying blood to the body
- 6. Wall dividing right and left sides of the heart
- 7. Double-layerd sac surrounding the heart
- 8. Small, ear-like appendage of the atria
- 9. Abnormally slow heart rate
- 11. Fibers that spread electrical impulses through ventricles
- 12. Muscles anchoring AV valve cords
- 14. Relaxation phase of the cardiac cycle
- 18. Abnormal heart sound caused by valve issues