Question

what part of the bone is this? metaphysis epiphysis medullary cavity diaphysis

Explanation:

The metaphysis is the region of a long bone between the epiphysis (the end part of a long bone) and the diaphysis (the shaft of a long bone). It contains the growth plate (epiphyseal plate in children and epiphyseal line in adults). The medullary cavity is the central cavity of a long bone that contains bone marrow. Based on the anatomical position and structure shown in the image (connecting the epiphysis - the blue - colored end part - and the diaphysis - the white - colored shaft - like part), the arrow points to the metaphysis.

Answer:

Metaphysis