Meta physics area of a long bone would probably be easiest to observe the cartilage the orthopedic doctor refers to.
The epiphyseal plate of the long bone cartilage is the major growth center and, in fact, this cartilage is responsible for almost all long bone growth. This is the layer of hyaline cartilage where ossification occurs in immature bone. Cartilage forms on the epiphyseal side of the epiphyseal plate.
The metaphysis is the area between the diaphysis and the epiphysis. Bone develops from the growth plate, matures, and is remodeled at the metaphysis of the growing bone. The epiphyseal plate and metaphyseal region are the major growth compartments of bone.
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