What is the difference between arteries and veins?
Arteries and veins are the parts of the circulatory system which carry blood between the heart, lungs, and all other areas of the body. While they both carry blood, they do not have much else in common. Arteries and veins are made of somewhat different tissue, each performing certain functions in a specialized way. The first and most important difference between the two is that all arteries carry blood away from the heart, and all veins carry blood to the heart from outlying areas. Most arteries carry oxygenated blood, and most veins carry de-oxygenated blood.
