3 MAIN COMPONENETS OF THE HEART
THE PUMP- 4 CHAMBERS- LEFT VENTRICLE IS THE MAIN
THE PLUMBING- CORONARY ARTERIES SUPPLY OXYGEN AND NUTRITION
THE WIRING-ELECTRICAL ACTIVITY
Electrical stimulus spontaneously generated by a specialized heart muscle called the SA node triggers activity which spreads all around the heart in a synchronized fashion making the right and left side pumps of the heart to squeeze blood out to the lungs and body. 4 Non-return valves (2 on each side, one inflow, and one outflow) ensure flow in one direction only. Blood vessels on the surface of the heart called the coronary arteries (the plumbing) supplies the heart with oxygen and nutrition. Disturbance in any of these very well organized and coordinated mechanism of the most vital pump in the body leads to serious heart disease.