Why does plaque no build up on veins?

Plaque buildup primarily occurs in arteries rather than veins due to differences in their structure and function. Arteries carry oxygen-rich blood away from the heart and are under higher pressure, which can lead to damage and inflammation that promote plaque accumulation. In contrast, veins carry deoxygenated blood back to the heart at lower pressure and have thinner walls, making them less susceptible to the processes that lead to plaque formation. Additionally, veins have valves that help maintain blood flow and reduce turbulence, further minimizing the risk of plaque buildup.