Where is the osteon system located

An equilibrium between osteoblasts and osteoclasts maintains bone tissue. Compact bone consists of closely packed osteons or haversian systems. The osteon consists of a central canal called the osteonic haversian canal, which is surrounded by concentric rings lamellae of matrix. Between the rings of matrix, the bone cells osteocytes are located in spaces called lacunae. Clark Brelje and Robert L. Sorenson All rights reserved. Each slide is shown with additional information to its right.

The image can be changed using any combination of the following commands. The address of this view has been copied to your clipboard. Woven bone : Woven bone is characterized by the irregular organization of collagen fibers and is mechanically weak. Woven bone is found on the growing ends of an immature skeleton or, in adults, at the site of a healing fracture.

Woven bone is characterized by the irregular organization of collagen fibers and is mechanically weak, but forms quickly. The criss-cross appearance of the fibrous matrix is why it is referred to as woven. It has a high proportion of osteocytes to hard inorganic salts that leads to its mechanical weakness.

Woven bone is replaced by lamellar bone during development. In contrast to woven bone, lamellar bone is highly organized in concentric sheets with a much lower proportion of osteocytes to surrounding tissue. The osteocytes are arranged in concentric rings of bone matrix called lamellae little plates , and their processes run in interconnecting canaliculi. This photo shows a cross section through bone.

Can you identify the primary and secondary Haversian systems, central canals and bone lamellae? This is a high power photo of a single Haversian system.