Across
- 6. closing of AV valves
- 9. graphic record of heart activity
- 11. blood cell formation
- 12. prevent backflow of blood
- 13. peak of ventricular contraction
- 15. lack of adequate blood supply to heart
- 16. semilunar valves close at the end of the systole
- 17. ventricles contacts
- 19. series of nerves that carry signals
Down
- 1. distributes the impulse out to the ventricules
- 2. blood circulates inside closed transport systems
- 3. Ventricles relax
- 4. blood to or from all body tissues
- 5. carriers on the signal from the SA Node
- 7. relaxation of ventricles
- 8. cardiac muscle of the heart
- 10. atria contract
- 13. blood to or from lungs
- 14. pacemaker of the heart
- 18. contraction of ventricles