Veins are blood vessels that have deoxygenated blood back to the center. Compared with arteries, which have oxygen-prosperous blood from the guts, veins transport blood which includes now delivered oxygen and nutrients to your body’s tissues. 2. The Circulatory Loop: – Veins are an integral part of the circulatory loop. https://www.sgvascularctr.com/spider-veins-removal-singapore/