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Bahasa Indonesia) 1:
[Salinan]Disalin!
Veins contain blood According to Galen, the liver is the source of all veins and the principle instrument of sanguification [4–7] (Fig. 1). In the stomach, food is concocted into chyle, which is then delivered to the small intestine and absorbed into veins. The chyle is carried in the portal vein to the liver, where nutriment becomes actual blood, which is charged with natural spirits. Blood is purified in the liver and then enters the hepatic vein through invisible connections between branches of the portal and hepatic veins. The blood moves from the hepatic vein to the inferior vena cava, which through its branches supplies all the parts of the body above and below the liver. In other words, blood moves centrifugally from the center (the liver) to the periphery. This is an open-ended system designed to provide one-time distribution of food. Each part of the body attracts and retains only enough blood for its immediate requirements. Blood that is assimilated into tissue is ultimately lost though invisible emanation. The parts receive fresh supplies from the liver as needed. As such, movement of blood was subsumed under the theory of nutrition according to which each body attracts, retains, and assimilates food, and expels its superfluities.
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