Definition
The metaphysis is the region of a long bone located between the diaphysis (shaft) and the epiphysis (end). Think of it as the bone's growth zone. It contains the growth plate (epiphyseal plate) during childhood and adolescence, which allows the bone to lengthen. After growth stops, the growth plate ossifies, and the metaphysis merges with the epiphysis. It's a critical area for bone growth and development. Simply put, it's the bone's fountain of youth!