Secondary ossification center

Definition

A secondary ossification center is the region in the epiphyses (ends) of long bones where bone tissue begins to form during fetal development and continues through adolescence. Unlike the primary ossification center in the diaphysis (shaft), these centers contribute to bone growth in length and commence after the primary centers are established.

Related terms

Ossification:

The biological process by which new bone is formed, replacing earlier cartilage templates or damaged tissue.

Epiphysis:

The rounded end part of a long bone, at its joint with adjacent bone(s).

Diaphysis:

The shaft or central part of a long bone, where primary ossification occurs