What is the metaphysis?

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Multiple Choice

What is the metaphysis?

Explanation:
The metaphysis is the portion of a long bone that lies between the shaft (diaphysis) and the ends (epiphyses). In growing individuals, this region contains the epiphyseal (growth) plate, where cartilage is steadily replaced by bone to lengthen the bone during development. This growth process, endochondral ossification, makes the metaphysis a key area for longitudinal bone growth and a common site of pediatric fractures. In adults, the growth plates have fused, but the metaphysis remains the transitional zone near the end of the bone. This differs from the endosteum, which lines the medullary cavity, and the periosteum, which covers the outer bone surface.

The metaphysis is the portion of a long bone that lies between the shaft (diaphysis) and the ends (epiphyses). In growing individuals, this region contains the epiphyseal (growth) plate, where cartilage is steadily replaced by bone to lengthen the bone during development. This growth process, endochondral ossification, makes the metaphysis a key area for longitudinal bone growth and a common site of pediatric fractures. In adults, the growth plates have fused, but the metaphysis remains the transitional zone near the end of the bone. This differs from the endosteum, which lines the medullary cavity, and the periosteum, which covers the outer bone surface.

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