Mucopolysaccharide which function as a lubricant and shock absorber in synovial fluid is
Hyaluronic Acid:
Hyaluronic acid is an important GAG found in the ground substance of synovial fluid of joints and vitreous humor of eyes. It is also present as a ground substance in connective tissues and forms a gel around the ovum. Hyaluronic acid serves as a lubricant and shock absorbent in joints.
Heparin
Hyaluronic acid
Keratin sulphate
Chondroitin sulphate