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What is the function of the liver?

As part of its function, the liver makes bile, a fluid that contains among other substances, water, chemicals, and bile acids (made from stored cholesterol in the liver). Bile is stored in the gallbladder and when food enters the duodenum (the first part of the small intestine), bile is secreted into the duodenum, to aid in the digestion of food.

The liver is the only organ in the body that can easily replace damaged cells, but if enough cells are lost, the liver may not be able to meet the needs of the body.

The liver can be considered a factory; and among its many functions include:

  • Production of bile that is required in the digestion of food, in particular fats
  • Storing of the extra glucose or sugar as glycogen, and then converting it back into glucose when the body needs it for energy
  • Production of blood clotting factors
  • Production of amino acids (the building blocks for making proteins), including those used to help fight infection
  • The processing and storage of iron necessary for red blood cell production
  • The manufacture of cholesterol and other chemicals required for fat transport
  • The conversion of waste products of body metabolism into urea that is excreted in the urine
  • Metabolizing medications into their active ingredient in the body

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