Describe in detail the way in which blood travels in the mammalian circulatory system

The arteries and the veins carry the blood to and from the heart, which purifies and pumps the blood. Arteries carry oxygenated blood from the heart and deliver it to various body parts. Veins carry deoxygenated blood to the heart, for its oxygenation. There are two atrium and two ventricles in the heart which open and close and perform the process of blood circulation and pumping.