Lubrication of joints.
D000818:Animals; D055592:Biophysical Phenomena; D001703:Biophysics; D002358:Cartilage, Articular / Q000502:physiology*; D007719:Knee Joint / Q000502:physiology*; D007734:Kymography; D008153:Lubrication; D011817:Rabbits; D013582:Synovial Fluid / Q000502:physiology*