The arterial system is a network of blood vessels that carry oxygen-rich blood away from the heart to various parts of the body. The main artery, called the aorta, branches into smaller arteries that distribute blood to organs and tissues. This system is crucial for delivering nutrients and oxygen necessary for cellular function. Arteries have thick, elastic walls that help withstand the high pressure of blood pumped from the heart. As arteries branch out, they become smaller and eventually lead to capillaries, where the exchange of oxygen and carbon dioxide occurs. Proper functioning of the arterial system is essential for overall health.