What is the main role of arteries in the circulatory system?

The main role of arteries in the circulatory system is to carry blood from the heart to body tissues. Arteries are large, muscular vessels that are designed to withstand the high pressure of blood being pumped directly from the heart. They transport oxygen-rich blood (except for the pulmonary arteries, which carry deoxygenated blood to the lungs) to various organs and tissues throughout the body.

This function is critical for supplying cells with the oxygen and nutrients they need for metabolism and overall function. As the arteries branch off into smaller arterioles and eventually capillaries, the blood can diffuse nutrients and oxygen directly into the tissues while collecting carbon dioxide and other waste products.

The other functions of blood circulation involve other types of vessels. For example, veins are responsible for carrying blood back to the heart. Capillaries, which are tiny blood vessels, are where the exchange of nutrients and waste occurs. Storage of blood is not a primary function of arteries; instead, certain organs such as the spleen serve that purpose.