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Liver. Gross specimen of a healthy liver. The liver carries out several metabolic and secretory functions. It breaks down the body's harmful waste products, destroys old red blood cells, and produces bile (which helps digest fats) and some proteins. Blood flows into the liver through the hepatic artery and the hepatic portal vein, which carries blood from the digestive system and spleen. Because of its uniform structure and regeneration ability, it can survive the loss of up to 75% of its mass.
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