endochondral ossification

physiology

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July 17, 2026

Quick Summary

Endochondral ossification is a crucial process in bone formation where cartilage is gradually replaced by bone. This process begins with a cartilage model that is later invaded by specialized connective tissue cells called osteoblasts. These osteoblasts secrete a matrix material called osteoid, which then becomes hardened by the deposition of inorganic salts, forming mineralized bone.12

This method is responsible for the formation of most short bones and the long bones of the arms and legs. In long bones, ossification starts near the center and proceeds towards the ends. A thin strip of cartilage, known as the epiphyseal plate, remains at the ends of growing bones, allowing for longitudinal growth until it is eventually replaced by bone, signaling the end of growth.13

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bone formation
…by bone is known as endochondral ossification. Most short bones have a single ossification centre near the middle of the bone; long bones of the arms and legs typically have three, one at the centre of the bone and one at each end. Ossification of long bones proceeds until only…
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…by bone is known as endochondral ossification. Most short bones have a single ossification centre near the middle of the bone; long bones of the arms and legs typically have three, one at the centre of the bone and one at each end. Ossification of long bones proceeds until only…
Read More