Hepatic veins ultimately from numerous central veins of the liver lobules. None of the hepatic veins have valves. The hepatic veins are divided into an upper and a lower group. The upper three drain the central veins from the right, middle, and left regions of the liver and are larger than the lower group of veins. The lower group of from six to twenty smaller hepatic veins come from the right lobe and the caudate lobe, are in contact with the hepatic tissue, and are valveless. All the veins empty into the inferior vena cava at the back of the liver. Budd–Chiari
Organ gifting by some as a mechanism through which the economic relations behind organ/tissue production, distribution, and consumption can be disguised. Organ/tissue gifting differs from commodification in the sense that anonymity and social trust are emphasized to reduce the offer and request of monetary compensation. It is reasoned that the implementation of the gift-giving analogy to organ transactions shows greater respect for the diseased body, honors the donor, and transforms the transaction into a morally acceptable and desirable act that is borne out of voluntarism and altruism. The concept of gifting with regards to body parts or fluids was first analyzed by