This document discusses different types of polysaccharides. It first describes homopolysaccharides which are either used for storage like starch, glycogen, dextrin, and inulin or are structural like cellulose and chitin. It then discusses heteropolysaccharides called muco polysaccharides or GAGs which include hyaluronic acid, chondroitin sulfate, heparin, and keratan sulfate. It provides details about dextran, noting that it is a highly branched homopolymer of glucose with different linkages, produced by microorganisms, with a high molecular weight between 1-4 million. Dextran is highly inert and used in gel preparation and as an intravenous plasma volume expander