As the body transports it through the biliary tract, the bile composition changes. Hepatic bile from the liver is primarily water with varying amounts of other substances. Bile in the gallbladder changes as the organ removes water and electrolytes, which makes the bile three to ten times more concentrated. At this point, the substance is primarily cholesterol and waste substances such as bilirubin. Without water, bile takes on a sludge-like texture.

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