what is the role of bile in the digestion process
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.here 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.