RADPATHO SKELETAL

-Skeletal system

is composed primarily of two highly specialized connective tissues: bone and cartilage

-Bone matrix

made up of calcium and phosphate

-Periosteum

- covers outer surfaces except for joint

surfaces (covered with articular cartilage)

Diaphysis

– shaftlike portion

Epiphysis

– ends of the bone

-Medullary cavity or marrow

– hollow, tube like structure within diapysis

-Endosteum

– inner membrane

Compact bone

-Outer layer, appears dense

-Haversian systems (microscopic structure)

-Thick layer for long bones (femur, tibia)

-Thin for irregular bones (vertebral bodies and

short bones)

Cancellous (spongy) bone, trabeculae

Weblike rrangemend of marrow filled spaces separated by this process of bone, called _

-Epiphyseal cartilage or epiphyseal growth plate

– site of longitudinal growth for long bones

Metaphysis

– where diaphysis meets the

epiphyseal growth plate

Osteoclasts

-Aged bone resorption

-enlarge the diamter of medullary cavity by

removing bone from diaphsis walls

Osteoblasts

- New bone formation

- produce new bone around the outer

circumference

Ossification

Resorption

– bone formation

– bone destruction

Greulich and Pyle method

- best known and most widely accepted method

of determining skeletal bone age (skeletal

maturation)

- permit an assessment of bone age based on the

presence or absence of ossification centers and

their configuration, and the fusion of epiphyses

in various portions of the hand and wrist.