labs 4-6 - skeletal system functions, etc. Flashcards
osteon
densely packed repeating structures that make up compact bone tissue
lacuna (ae)
small cavities that contain osteocytes which monitor and maintain the bone ECM
connected by canaliculi
what is the ECM of osseous tissue made of
organic component - ground sustance and collagen
inorganic component - Ca hydroxyapatite crystals
canaliculi
tiny canals which connect osteocytes together allowing for communication
concentric lamella (ae)
osteocyte layers surrounding central canal
periosteum
most superficial layer of bone, made of dense irregular connective tissue with lots of blood vessels and nerves
extending collagen fibers (perforating fibers) anchor it to bone
has osteoblasts and osteoclasts
endosteum
lines central canals and has osteoblasts and osteoclasts
central canal
location of blood vessels and nervs supporting osteocytes of osteon
interstitial lamella (ae)
old osteocyte layers (presence due to bone remodeling) located in between osteons
circumferential lamella (ae)
osteocyte layers surrounding superficial layers of bone, giving additional strength
compact bone
hard, dense, immediately deep to periosteum made up of repeating osteons
spongy bone
deep to compact bone, resembles a sponge, latticework type structure
trabecula (ae)
tiny bone spicules, lined with endosteum
bone marrow
red bone marrow produces blood cells
yelllow bone marrow is made up of adipose tissue
perforating (volkmann canal)
canals that allow for passage of blood
lined by endosteum
run perpendicular to lamella
nutrient foramina
openings in the superficial portion of bone, allowing for blood vessels and nerves to enter perforating canals
facet
shallow indented surface where two bones meet to form a joint
fossa
deep indented surface, usually allows a rounded surface of another bone to fit inside
fovea
shallow pit, often a site for ligament attachment
groove
long, shallow depression, usually a location for blood vessel or nerve
sulcus
another name for groove
notch
deep cut (or notch) in a bone
canal
passageway through bone
meatus
another name for canal