once the collagenous base has been developed the chondroblasts secrete chondroitin sulfate and hyaluronic acid both glycoproteins into the extracellular apaces.chondroitin sulfate form the largest component of the cartilagenous matrix and give this matrixits characteristic opalescent appearance its ability to retain fluids and its strong resistance against deformation the hyaluronic acid provides lubrication for the joint