Understanding Bone Epiphyses: Structure and Function

Epiphyses (singular epiphysis) are the ends of long bones. They are composed of cancellous bone, which is a type of bone that is made up of a network of thin, interconnecting trabeculae (bone struts). Cancellous bone is found in the interior of all bones, but it is especially abundant in the epiphyses.

Epiphyses are responsible for the growth of long bones. They contain a growth plate, which is a layer of cartilage that is located between the epiphysis and the diaphysis (the shaft of the bone). The growth plate is where new bone tissue is added to the bone, causing the bone to grow in length.

Once a person reaches skeletal maturity, the growth plates close and the epiphyses fuse to the diaphysis. This marks the end of bone growth in length.