Long bone and osteos

Long bone

Humerus, femur, tibia, phalanges

Short bones

Carpels and tarsals

Flat bone

Cranial, sternum

Irregular bones

Coral, vertebrae, scapula

Sesamoid bones (round bones)

Patella

Osteoblasts

These are the bone forming cells

Secrete the college in ground substance constitudes unmineralized bone

Responsible for classification of the matrix

Osteocytes

Mature bone cell

Synthesize in breakdown the matrix to maintain homostasis

Each osteocytes occupies a space of the lacuna

Osteoclasts

Large multinucleated cells

Function is to reabsorb or eat bone or break down bone

Dissolves matrix with acids and hydrolytic enzymes phagocytes

When do osteoclasts and osteoblasts turn into osteocytes

When you mature around the age 25

What happen to the osteoblasts and osteoclasts when you mature

They popped back up to help with repair

Osteocytes do both jobs of what

Osteoblasts and osteoclasts

Diaphysis

Shaft with contact bone and medullary cavity.

Epiphysis

Ends articular cartilage and compact bone covering cancellous bone

epiphyseal line

Between epiphysis and diaphysis - Region of bone growth

Also known as epiphyseal plate or growth plate

Medullary cavity

Filled with yellow bone marrow

Articular cartilage

Hyaline cartilage on the ends of longbones

Periosteum

Vascular covering of fibrous tissue

Completely enclosed outside of the bone

Rich supply of nerves and blood vessels

Endosteum

Cellular layer contains cytes, clasts and blast.

Covering trabeculae and lines inner shafts of bones

Haversian system is also known as

Osteon

Central Haversian canal or osteonic canal

Pathway for blood vessels and nerves

Volkmann's canals or preforating canal

Right angle to central canal connects Haversian canal to another Haversian canal. Communication

Osteocytes in lacuna

Between lamellar layers

Canaliculi

Communicate - connects lacunae - lacunae and Haversian canal

Lamella

Concentric rings