1. Bone Histology

2. Remember, bone is a living tissue!
Types of Bone Cells
Osteocyte: Mature bone cell
Osteoblast: Bone-forming cells
Osteoclast: Bone-destroying cells
Remember, bone is a living tissue!

3. Microscopic Structure of a Compact Bone
Osteon System: A central (Haversian) canal with concentric rings (lamellae) of bone matrix running lengthwise. Very strong!

4. Lacunae: tiny cavities inside the lamellae rings
Lacunae: tiny cavities inside the lamellae rings. This is where the osteocytes are found.

5. The central canal carries blood vessels and nerves to all areas of the bone.

6. So how do all bone cells get nourishment and contact the body outside the bone?
Canaliculi (kan” ah-lik’-u-li): tiny canals that radiate outward from the central canals to each lacunae space.
Volkmann’s Canals: canals that run at right angles to the central canals and perforate the shaft of the bone.

8. Spongy bone
Trabeculae: Loosely organized lamellae rings with osteocytes (no central canal).
Canaliculi connect the osteocytes.
Works like struts along lines of stress in bone to offer strength, yet lightweight.