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Representative image of the SOC formation in the left humerus of growing dogs - HE staining; a) at 0 days of age; b) at 7 days of age; c) at 21 days of age. NO, no ossification; EO, early ossification; OC, ossification center; arrow, cartilage canal; HC, hypertrophic chondrocytes; SOC, secondary ossification center. Scale bar: 1000 µm.
