Chapter 3 Flashcards
ossification
bone forming from fibrous tissue
osteoblasts
immature bone cells that make bone tissue
osteoclasts
phagocytic bone cells that eat bony tissue away from the medullary cavity of the long bone
osteocytes
matures bone cells
medullary cavity
inner space of long bone, contains yellow marrow
articular cartilage
covers joint surfaces of bones
meniscus
curved fibrous cartilage found in some joints that cushions
synarthroses joint
no movement, eg suture (jagged line where bones meet)
amphiarthroses joint
slight movement (eg symphysis: 2 bones join and function as 1, mandible)
AKA cartilaginous joint
diarthroses joint
free movement (eg. synovial joints - ball and socket)
fontanelle
soft spot remaining at junction of sutures, usually closes after birth
enarthrosis
ball and socket joints
cortical bone
hard outer layer AKA compact
cortex
bark/shell
cancellous bone
spongy inner bone
epiphysis
wide end of long bone (proximal and distal ends)
cancellous
diaphysis
shaft of long bone
compact
physis
cartilage of long bone AKA growth plate AKA epiphyseal cartilage
metaphysis
wide part of long bone adjacent to physis
- considered part of epiphysis in adults
periosteum
fibrous tissue covering outer bone
endosteum
fibrous tissue lining medullary cavity
long bones
shaft + 2 ends + marrow cavity
short bones
cube, no marrow cavity
flat bones
thin (pelvis)