The human heart can be compared to the engine of a car—both are power units that keep bodies moving. Your heart works as a pump that pushes blood to the organs, tissues, and cells of your body. The blood pumped by the heart delivers oxygen and nutrients to every cell and removes the carbon dioxide and waste products made by those cells. But if blood flow to the heart is slowed or stopped or the heart beats irregularly, your life may be in danger. Like your car engine, how you treat your heart will determine how long and how well it will continue to work for you. ....more