skeletal exam Flashcards
define Osteoprogenitor cell
Stem cells
undergo mitosis
define Osteoblasts
Immature bone cells, make up part of the matrix
define Osteocytes
Mature cells, maintain the matrix
define Osteoclasts
Large multinucleated cells that have lyosome responsible or breaking down the bone
define Hydroxyapatite crystals
Hard mineral salts- Ca2+
hard
define Osteoid
Collagen protein fibers made by osteoblast
strong and flexible
define Trabeculae
Thin bony plates
define lamellae
Concentric rings of the matrix
define lacunae
Hold osteocytes
define caniliculi
Channels in the matrix that come off the lacunae allows
cells to communicate
define osteon
Long cylindrical haversian systems
define interstitial lamellae
Remnants of old osteon
define circumferential lamellae
define volkmanns canals
Run perpendicular to central canals of osteons
define endosteum
Lines marrow cavities
contains: simple squamous epithelium
osteoprogenitor cells
define periosteum
Goes around outside of bone
has fibrous and cellular layers
define diaphysis
define epiphysis
define metaphysis
define epiphyseal plate
define epiphyseal line
define osteogenisis
Bone development process of ossification and calcification
define calcification
Puts mineral salts into bone
define primary center of ossification
define secondary centers of ossification
define simple fracture
Closed
not exposed
define compound fracture
Open bone is exposed
define synarthrotic
define amphiarthrotic
define diarthrotic
define flexion
define extension
define hyperextension
define dorsiflexion
define plantar flexion
define abduction
define adduction
define rotation
define circumduction