Across
- 1. contraction of ventricles
- 5. Red blood cells
- 8. Events of one heartbeat
- 11. Abnormally shaped hemoglobin
- 12. Ventricles relax
- 13. lack of adequate blood supply to the heart
- 14. Prevents backflow of blood
- 15. bone marrow becomes cancerous
- 17. records the electrical activity of the heart
- 18. Pacemaker of the heart
- 19. blood cell formation
Down
- 2. rapid heart rate
- 3. very slow heart rate
- 4. Ventricles compact
- 6. cell fragment
- 7. Distributes the impulses out to the ventricles
- 9. relaxation of the ventricles
- 10. Atria Contract
- 16. Receives blood (entryway)
- 20. Outer layer of heart