1. OSSEOUS TISSUE ORGANIZATION

2. Bone (Osseous) Tissue Characteristics
Dense matrix, supportive connective tissue
Majority is solid matrix of calcium phosphate, Ca3(PO4)2
Around collagen fibers (approx. 25% collagen)
Osteocytes within lacunae organized around blood vessels

3. Organization of Compact Bone Tissue
Osteon is basic unit of mature compact bone
Osteocytes are arranged in concentric lamellae
Around a central canal (Haversian canal) containing blood vessels

4. Perforating Canals Concentric Lamellae
Also called horizontal canals or Volkmann’s canals)
Perpendicular to the central canal
Carry blood vessels into bone and marrow
Concentric Lamellae
(plate-like membrane)
wrapped around the entire long bone
Binds osteons together

5. Spongy Bone Tissue No organized osteons
The matrix consists of trabeculae which are strands of bone that make up an irregular “meshwork” / “lattice work” with spaces

6. Spongy Bone Tissue
The space between trabeculae is filled with red bone marrow:
Which forms red blood cells and supplies nutrients to osteocytes
In some bones, spongy bone holds
yellow bone marrow (stores fat)