This document discusses carbohydrate chemistry, including disaccharides, polysaccharides, and specific polysaccharides like starch, glycogen, dextran, cellulose, and inulin. It also covers glycosaminoglycans like hyaluronic acid, chondroitin sulfate, keratin sulfate, dermatan sulfate, heparan sulfate, and heparin. Proteoglycans and glycoproteins are also summarized. The document provides details on the composition, structure, sites, and functions of these various carbohydrates.