what is the function of bile?
Secretion of Bile and the Role of Bile Acids In Digestion. Bile is a complex fluid containing water, electrolytes and a battery of organic molecules including bile acids, cholesterol, phospholipids and bilirubin that flows through the biliary tract into the small intestine. There are two fundamentally important functions of bile in all species: 1  Bile contains bile acids, which are critical for digestion and absorption of fats and fat-soluble vitamins in the small intestine.
1 Bile contains bile acids, which are critical for digestion and absorption of fats and fat-soluble vitamins in the small intestine. 2  Many waste products, including bilirubin, are eliminated from the body by secretion into bile and elimination in feces.