Within a long bone, the region of cartilage within the metaphysis that allows for bone growth is called the epiphyseal .

The region of cartilage within the metaphysis that allows for bone growth is called the epiphyseal plate, also known as the growth plate. This plate is critical during the development of long bones as it is the area where new bone tissue is formed, enabling the bone to elongate.

The epiphyseal plate consists of several layers of cartilage cells that undergo a process called endochondral ossification. In this process, the cartilage cells multiply and their surrounding matrix serves as a scaffold for the new bone that subsequently forms. As a person matures and reaches skeletal maturity, the epiphyseal plate gradually ossifies and becomes the epiphyseal line, which indicates that bone growth has concluded.

This process is essential for proper growth and development, as it allows for the increase in length of long bones, which is necessary for overall stature and support. Any disruption in the function of the epiphyseal plate can lead to growth disorders or abnormalities in bone length.