Across
- 6. Rapid heart rate
- 7. Decrease in oxygen carrying ability of blood
- 9. Semilunar valves close at endof systole
- 10. Contract spontaneously and independently
- 11. Blood cell formation
- 15. Lack of adequate blood supply to heart
- 16. Clogged coronary vessels
- 18. Distributes the impulse out of the ventricles
- 20. Prolonged angina heart cells may die
Down
- 1. Abnormal or unusual heat sounds
- 2. Volume of blood pumped out by one ventricle with each beat
- 3. Very slow heartbeat
- 4. Atria contact
- 5. Iron-containing protein, binds to O2
- 8. Graphic record of heart activity
- 12. Ventricles relax
- 13. Ventricles contract
- 14. Sinoatrial node pacemaker of the heart
- 17. Closing of av valves
- 19. Uncoordinated shuddering of heart attacks