Now there are two types of blood vessels that are found inside our body. We have a blood vessel that carries blood away from the heart and this is known as an artery. So by definition an artery is a blood vessel that always carries our blood away from the heart. And one easy way to remember this is by remembering that a wave starts with A and so does our artery. Now the arteries most of the time carry oxygenated blood but there are times as we'll see in just a moment in which an artery can actually carry deoxygenated blood. Now the arteries, these blood vessels come in many different sizes.