The Heart

The heart is a muscular organ about the size of a fist that pumps blood throughout the body. It has four chambers: two upper chambers (atria) and two lower chambers (ventricles). The heart's main function is to circulate oxygen-rich blood from the lungs to the body and return oxygen-poor blood back to the lungs. It does this through a rhythmic beat, controlled by electrical signals that coordinate contractions. Proper heart function is essential for delivering nutrients and removing waste, supporting overall health and organ function. Maintaining heart health involves a balanced lifestyle, regular exercise, and managing risk factors like blood pressure and cholesterol.