Across
- 3. Sound representing closure of AV valves at onset of systole
- 4. Provide mechanical strength between adjacent cardiomyocytes
- 9. Muscular ridges found mainly in the right atrium
- 10. Sound representing closure of semilunar valves at onset of diastole
- 13. Thickest layer of the heart wall, especially in the left ventricle
- 14. Spaces we count to place V3-V6 on an ECG
- 15. ECG lead classically showing P wave, QRS, and T wave clearly
- 16. Right atrioventricular valve with three cusps
- 19. Muscles that contract to prevent AV valve prolapse
- 20. Specialized conducting fibers ensuring rapid ventricular depolarization
- 21. Structure that delays conduction between atria and ventricles
Down
- 1. Fibro-serous sac enclosing the heart and roots of the great vessels
- 2. Artery supplying anterior two-thirds of interventricular septum
- 3. Primary pacemaker of the heart
- 5. Innermost lining :of the heart chambers
- 6. arteriosum Fetal ductus arteriosus remnant, near left recurrent laryngeal nerve
- 7. Remnant of the fetal foramen ovale found in the interatrial septum
- 8. Structures enabling electrical coupling between cardiomyocytes
- 11. Coronary artery branch curving around left atrioventricular groove
- 12. The pressure the ventricle must overcome to eject blood
- 17. Small dip in aortic pressure tracing due to semilunar valve closure
- 18. Only atrioventricular valve with two cusps