Cells of bone tissue

Osteoprogenitor Cells

Bone stem cells

Osteoblasts

Secrete Bone matrix

Osteocytes

monitor & maintain bone matrix

Osteoclasts

bone resorption

Osteon

The structural unit of compact bone

Lamellae

A series of concentric tubes of bone matrix called

Central canal

runs through center of each osteon & allows passage of BV and nerves

Perforating canals

lie at right angles to the long axis of the bone & connect the blood & nerve supply of the medullary cavity to the central canals

Lacunae

small holes housing the osteocytes – are found at the junctions of the lamellae

Canaliculi

a series of hair like channels that connect to each other and the central canal

Interstitial lamellae

lie between intact osteons, filling the spaces in between

Circumferential lamellae

located just beneath the periosteum & extending around the circumference of the bone

Endochondral ossification

bone develops by replacing hyaline cartilage = endochondral bone

Intramembranous ossification

bone develops from a fibrous membrane = membranous bone