Woven-lamellar bone

This tissue is composed of both woven and lamellar bone. During both intramembranous and endochondral ossification, the first bone formed is woven bone which is gradually remodeled into lamellar bone. As a result, some areas will be composed of both woven and lamellar bone, as shown here. Similar event occur during adult remodeling and repair following a fracture. 600x

In woven (immature) bone, osteocyte lacunae an irregularly arranged within the matrix which lacks lamellae. Lacunae are rounder than are those in mature bone and the matrix has a more bluish tint due to the proteoglycans in the matrix and reduced collagen fibers content. Woven bone is not as strong as lamellar bone.

Lamellar (mature) bone is organized in lamellae with orderly arranged, flattened lacunae between them. This organization gives lamellar bone more strength. In the bone shown here, the lamellae are arranged as cylindrical structures called Haversian systems or osteons with a central Haversian canal. This canal is lined by an endosteum and contains one or more blood vessels. On the surface of bones, these lamellae are arranged as flattened plates.

Lamellar (mature) bone is organized in lamellae with orderly arranged, flattened lacunae between them. This organization gives lamellar bone more strength. In the bone shown here, the lamellae are arranged as cylindrical structures called Haversian systems or osteons with a central Haversian canal. This canal is lined by an endosteum and contains one or more blood vessels. On the surface of bones, these lamellae are arranged as flattened plates.

Lamellar (mature) bone is organized in lamellae with orderly arranged, flattened lacunae between them. This organization gives lamellar bone more strength. In the bone shown here, the lamellae are arranged as cylindrical structures called Haversian systems or osteons with a central Haversian canal. This canal is lined by an endosteum and contains one or more blood vessels. On the surface of bones, these lamellae are arranged as flattened plates.

Lamellar (mature) bone is organized in lamellae with orderly arranged, flattened lacunae between them. This organization gives lamellar bone more strength. In the bone shown here, the lamellae are arranged as cylindrical structures called Haversian systems or osteons with a central Haversian canal. This canal is lined by an endosteum and contains one or more blood vessels. On the surface of bones, these lamellae are arranged as flattened plates.