Transition from synovial into chondral membrane.
D000328:Adult; D000818:Animals; D002358:Cartilage, Articular / Q000648:ultrastructure*; D002417:Cattle; D006801:Humans; D008253:Macaca mulatta; D008566:Membranes / Q000648:ultrastructure*; D013583:Synovial Membrane / Q000648:ultrastructure*