Osteocytes

mature bone cells that make up most of the cell population

Osteopenia

Inadequate ossification of bone mass that usually happens between ages of 30-40

External callus

enlarged collar of cartilage and bone that forms and encircles the bone at the level of a fracture

Fracture hematoma

Blood vessels are broken and extensive bleeding occurs within the fracture of a bone

Endosteum

An imcomplete cellular layer that lines the medullary cavity

Canaliculi

Narrow passageways that penetrate the lacunae, radiating through the matrix and connecting lacunae with one another

Osteoclasts

cells that remove and recycle bone matrix

Osteon

The basic functional unit of mature compact bone

Osteoblasts

produce new bone matrix in a process called ossification, or osteogenesis

Sesamoid bone

bones that are small,flat, and shaped somewhat like a sesame seed

Long Bone

bones that are fairly long and slender

Sutural bone

small, flat, irregularly shaped bones between the flat bones of the skull

Irregular bone

bones that have complex shapes with short, flat, notched, or ridged surfaces

Spongy bone

consists of an open network of struts and plates that resembles latticework with a thin covering, or cortex, of compact bone

Osteolysis

Erosion process important in regulation of calcium and phosphate concentrations in body fluids

Central canal or

Haversian canal

Canal that contains one or more blood vessels that carry blood to and from the osteon

Red bone marrow

responsible for blood cell formation within the bone

Achondroplasia

A disorder of bone growth that causes the most commen type of dwarfism

Closed reduction

The correction of a bone fracture by manipulation without incision into the skin

Osteomyelitis

An acute or chronic bone infection

Osteosarcoma

A type of cancer that starts in the bones; also called osteogenic sarcoma

Orthopedics

The branch of medicine dealing with the correction of deformities of bones or muscles

Bone marrow transplant

Traction

The application of a sustained pull on a limb or muscle in order to maintain the position of a fractured bone until healing occurs or to correct deformity

Paget's Disease

A chronic disorder that can result in enlarged and misshapen bones due to abnormal bone destruction and regrowth