Across
- 4. – Vessel carrying blood from heart to lungs.
- 6. – Heart chamber pumping blood to body.
- 7. – Vein collecting blood from heart muscle.
- 9. – Wall dividing left and right heart sides.
- 11. – Large vein bringing blood to the heart.
- 13. – Fibers spreading electrical signals in ventricles.
- 16. – Heart muscle layer.
- 17. – Upper right heart chamber receiving deoxygenated blood.
- 18. – Main artery carrying blood from heart to body.
- 20. – Heart chamber pumping blood to lungs.
- 21. – Pathway for electrical signals in heart.
- 22. – Device or tissue that regulates heartbeat rhythm.
- 23. – Inner lining of the heart chambers.
Down
- 1. – Valve controlling blood flow to aorta.
- 2. – Part of AV bundle conducting impulses to ventricles.
- 3. – Electrical relay between atria and ventricles.
- 5. – Upper left heart chamber receiving oxygenated blood.
- 8. – Valve controlling blood flow to lungs.
- 10. – Valve between right atrium and ventricle.
- 12. – Protective sac around the heart.
- 14. – Heart’s natural pacemaker, starts heartbeat.
- 15. – Valve between left atrium and ventricle.
- 19. arrest – Sudden stop of heart beating.