Lubrication and wear of joints.
D001698:Biomedical Engineering; D002358:Cartilage, Articular / Q000502:physiology; D006801:Humans; D007595:Joint Prosthesis; D007596:Joints / Q000502:physiology*; D008153:Lubrication; D005082:Physical Exertion; D013582:Synovial Fluid; D013583:Synovial Membrane / Q000502:physiology