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Epiphyseal growth plate, light micrograph. Growth or epiphyseal plate of a developing long bone showing the following layers, from right to left: resting hyaline cartilage, zone of proliferation with chondrocyte columns, zone of hypertrophy with large lacunae, zone of calcification with dead chondrocytes, and an ossification zone, with blood vessels and osteogenic cells. The left half of the