poly saccharides that are composed not only of a mixture of 
simple sugars but also of derivatives of sugars such as 
aminosugars and uronic sugars are called muco poly 
saccharides.

they are gelatinous substances of high molecular weights . 
most of these acts as support material for connective 
tissue or mucous substances of the body.
they consists of disaccharide units in which a uronic acid 
is bound by a glycosidic bond to the c3 of an acetylated 
aminoacid.
eg:hyaluronic acid,chondroitin,keratosulfate etc;