The primary function of the heart is to pump blood throughout the body. It circulates oxygen-rich blood to the organs and tissues while simultaneously returning oxygen-poor blood to the lungs for re-oxygenation. The heart operates in a rhythmic manner, coordinating contractions through an electrical system that regulates heart rate. This ensures that all body cells receive the necessary nutrients and oxygen for proper functioning while also aiding in the removal of waste products. In addition to its vital role in maintaining circulation, the heart also plays a critical part in regulating blood pressure and overall cardiovascular health.