Across
- 5. sinoatrial node (SA node)
- 6. endothelium lines chambers
- 10. receive blood
- 12. blood to/from all body tissues
- 13. pump blood out
- 14. uncoordinated shuddering of heart
- 15. wall between atria and ventricles
- 16. rapid heart rate
- 17. volume of blood pumped out by ventricle
- 18. prevent backflow of blood
- 19. lack of blood supply to the heart
Down
- 1. blood to and from lungs
- 2. slow heart rate
- 3. clogged coronary vessels
- 4. one heartbeat
- 6. electrical record of heart's activity
- 7. heart muscle
- 8. outer layer of heart
- 9. heart deprived of O2, leads to chest pain
- 11. unusual heart sound