Blood Vessels: Understanding Arteries, Veins & Capillaries

The blood in our body is carried by blood vessels. There are three main types of blood vessels: arteries, capillaries, and veins. Arteries carry blood away from the heart to the rest of the body, while veins carry blood back to the heart. Capillaries are the smallest blood vessels and are where oxygen and carbon dioxide are exchanged between the blood and the body's tissues.