Human joint lubrication.
D001696:Biomechanical Phenomena; D002358:Cartilage, Articular / Q000502:physiology; D006621:Hip Joint / Q000502:physiology; D006801:Humans; D007596:Joints / Q000502:physiology*; D007719:Knee Joint / Q000502:physiology; D010003:Osteoarthritis; D013582:Synovial Fluid / Q000502:physiology*