(i) Carbohydrates, lipids, and proteins are completely digested in the small intestine. For this function, it receives the liver and the pancreas secretions.
(ii) For pancreatic enzymes to work on stomach-born food, they must be converted from their naturally acidic state to an alkaline one. This is done with the help of bile juice, which the liver produces.
(iii)Larger globules of fat are typically present in the intestine, making it challenging for enzymes to break them down. Larger globules are broken down into smaller globules with the aid of the bile salts. Trypsin, an enzyme for breaking down proteins, and lipase, an enzyme for breaking down emulsified fats, are both found in pancreatic juice, which is secreted by the pancreas.
(iv) Intestinal juice is secreted by glands found in the small intestine walls. Finally, the enzymes in it transform fats into fatty acids and glycerol, complex carbs into glucose, and proteins into amino acids.