What are not characteristics of veins?

Veins typically do not have thick muscular walls like arteries; instead, they have thinner walls that are less elastic. They also do not carry oxygenated blood in most cases, as they primarily transport deoxygenated blood back to the heart. Additionally, veins lack the high pressure found in arteries, which means they do not have the same pulsatile flow. Lastly, veins generally do not have a narrow lumen; they have a wider lumen to facilitate blood flow.