 Dear students, in this topic, we shall discuss the digestive enzymes, carbohydrates and lipases. Carbohydrates are the enzymes which digest carbohydrates by hydrolyzing them. The carbohydrates are divided into two groups, polysaccharides and glycosidases. Polysaccharides hydrolyze the glycosidic bonds of long-chain carbohydrates i.e. cellulose, glycogen and starch. The most common polysaccharides are the amylases. Amylases are secreted by the slivery glands and pancreas. So, they are present in sliver and pancreatic juice. Amylases hydrolyze all glycosidic bonds except the terminal ones. They break glycosidic bonds within starch and glycogen. As a result, they produce disaccharides and oligosaccharides. They cannot produce free monosaccharides because they do not act on the terminal bonds. However, they break polysaccharides within shorter segments. After the action of polysaccharides, the action of glycosidases begins which act on disaccharides. For example, sucrose, maltose and lactose. Glycosidase is a specialist to break the alpha-16 and alpha-14 glycosidic bonds which are found in disaccharides. As a result, they release free monosaccharides. Dear students, now we shall discuss the lipases. Which are the enzymes to digest lipids and fats. Lipases are secreted in pancreatic juice and in the fluids secreted by intestinal epithelium. They act on emulsified fats which are present in the form of droplets. After the action of bile salts, these enzymes hydrolyze these fat droplets into monoglycerides, diglycerides and free fatty acids and glycerol. The emulsification by bile salts is necessary for lipases action to start and hydrolyze the lipids. If bile salts are in insufficient quantity, if bile is not secreted, then in that case fats are not emulsified and in this case lipases action cannot be completed. That is why the digestion of fats is incomplete. That is the reason why those people who are not able to eat fats because of any problem, are not able to eat fats because they do not produce bile. That is why they cannot complete the digestion of fats.