For the most part, veins play a vital role in the functioning of your cardiovascular system. The heart does most of the work, sending oxygen and nutrient-rich blood to all areas of the body with each beat. And when the blood’s depleted of its supplies, the veins deliver it back to the heart.
Some may confuse veins with arteries, but each one serves a particular purpose in the cardiovascular system. While veins carry deoxygenated blood back to the heart, arteries do the opposite – they carry the oxygenated liquid out to the tissues. However, there’s a more specific way to differentiate each pathway.
Both the veins and arteries take place in pulmonary circulation, too, wherein the blood becomes infused with oxygen. In this process, veins return the oxygenated blood to the heart, while arteries pull the air-free blood from the heart to the lungs. So, as it turns out, we can’t differentiate the two circulatory components by the fact that they carry oxygenated or deoxygenated blood – they do both.