Across
- 1. Pacemaker of the heart.
- 3. The cardiac muscle.
- 7. Part of the heart that pumps blood out.
- 8. Blood to/from all body tissues.
- 9. Blood to/from the lungs.
- 10. Rapid heart rate.
- 12. Atria contact.
- 15. Part of the heart that receives blood.
- 16. Lack of adequate blood supply to the heart.
- 19. Blood cell formation.
Down
- 2. The rarest blood type.
- 4. Graphoc record of heart activity.
- 5. The heart is surrounded by the ___________.
- 6. Word for the contraction of ventricles.
- 9. Distributes impulse to the ventricles.
- 11. Ventricles relax.
- 13. Prevents backflow of blood in the heart.
- 14. Word for the relaxation of ventricles.
- 17. The wall between the atrium and ventricles.
- 18. Ventricles contract.