The arteries are blood vessels that carry blood from the heart to the rest of the body. With a poor diet high in fats and cholesterol, artery walls can become clogged with a fatty substance called plaque. When this happens, blood flow is reduced and every function of the body suffers. Over time, plaque can cause the walls of the artery to harden, raising the risk for a heart attack. Luckily, there are many foods that help unclog arteries naturally and keep the heart healthy.