oligosaccharides and polysaccharidespeptidoglycan polysaccharideextracellular polysaccharidepolysaccharides includebacterial polysaccharidesstructural polysaccharideso specific polysaccharidechitin polysaccharideprotein polysaccharidestarch is a polysaccharideastragalus polysaccharideinulin polysaccharide