Across
- 3. Divides the right and left sides of the heart
- 6. Spread electrical signals through ventricles
- 7. Upper chamber of the heart that receives blood
- 10. Prevents backflow of blood
- 12. Natural pacemaker of the heart
- 13. Conducts impulses to ventricles
- 14. Main artery carrying blood from the heart
- 16. Relaxation phase of the heart
- 18. Contraction phase of the heart
- 19. Carries blood to the heart
Down
- 1. Helps in clotting blood
- 2. Tightening of the heart muscles
- 4. Liquid part of blood
- 5. Fights infection
- 8. Smallest blood vessel
- 9. Carries oxygen
- 10. Lower chamber that pumps blood out of the heart
- 11. Loosening phase allowing blood to fill
- 15. Carries blood away from the heart
- 17. Delays impulse before it reaches ventricles