Confocal laser scanning microscopy (CLSM) images of chondrocytes in articular cartilage. (A,B) Transverse view of arrangements of chondrocytes (strings and pairs) in the superficial zone of articular cartilage of different loading locations. (C) Longitudinal view of articular cartilage from superficial zone to deep zone. Images were taken from an acriflavine-stained fresh femoral condyle articular cartilage sample from kangaroo. X and Y coordinates indicate images that were parallel to the cartilage surface and taken from a transverse view; X and Z coordinates indicate images that were vertical to cartilage surface and taken from a longitudinal view.