The metaphysis is the wide portion of the neck of a long bone between the head or end and the main shaft called the diaphysis. It is considered to be a part of the growth plate, the part of the bone that grows during childhood and as it grows, it hardens or ossifies. The femur is usually the one people talk about because it is the thigh bone that meets and forms part of the hip joint. If someone has osteoporosis, it can become weakened and cracked and require a hip replacement.
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