Shared Flashcard Set

Details

Histology Exam 1 - Bone
Bone
71
Histology
Professional
09/20/2011

Additional Histology Flashcards

 


 

Cards

Term
appositional growth
Definition
only way that bone grows
Term
mesenchymal cells
Definition
main stem cells of bone
Term
woven bone
Definition
immature/fibrous bone; large lacunae
Term
lamellar bone
Definition
mature bone; smaller lacunae
Term
osteoblast
Definition
cells that produce a bony matrix; can be active or inactive
Term
osteocyte
Definition
mature bone cell which maintains the matrix
Term
osteoclasia
Definition
absorption of minerals by an osteocyte
Term
osteoclast
Definition
multinucleated bone cells that participate in resorption of minerals and matrix cells (osteoclasia)
Term
cancellous bone
Definition
spongy/trabecular bone; woven or lamellar bone; generally occurs in bone where additional strength is required
Term
compact bone
Definition
dense/cortical bone
Term
organizations of lamellar bone
Definition
circumferential, osteonal, and interstitial
Term
circumferential bone
Definition
bone derived from periosteum or endosteum of marrow cavity
Term
inner circumferential bone
Definition
bone derived from endosteum of the marrow cavity
Term
outer circumferential bone
Definition
periosteal lamellar bone; bone derived from the periosteum
Term
periosteum
Definition
outer covering of bone; consists of fibers and cells
Term
endosteum
Definition
inner covering of bone (surface of marrow cavity and surface of osteonal canals)
Term
secondary osteons and interstitial bone
Definition
indicitive that internal remodeling has occurred
Term
resorption space
Definition
indicitive that removal of bone via osteoclasia has occurred
Term
canaliculi
Definition
contain cell processes of osteocytes
Term
osteons
Definition
structural units of bone
Term
trabeculae
Definition
"fingers of bone" oriented to stress
Term
epiphysis
Definition
part of bone containing articular surface
Term
diaphysis
Definition
"long" part of bone
Term
physis
Definition
growth plate
Term
bone ECM
Definition
extensive and mineralized
Term
osteocalcin
Definition
Ca2+ binding protein
Term
osteonectin
Definition
anchors mineral to collagen
Term
organic constituents of bone
Definition
collagen, osteocalcin, osteonectin, GAGs
Term
hydroxyapatite
Definition
calcium phosphate; replaces water in bone
Term
mechanical properties of bone
Definition
compressive and tensile
Term
Howship's Lacunae
Definition
spaces in bone where osteoclasts have been
Term
osteoporosis
Definition
body utilizing Ca2+ from bone
Term
osteoid seam
Definition
unmineralized lamellar bone; newly deposited in osteonal canal
Term
osteolysis
Definition
demineralization of matrix around lacuna; day-to-day Ca2+ regulation
Term
locations of woven bone
Definition
development, fracture repair, and osteosarcoma
Term
configurations of bone
Definition
cancellous and compact
Term
secondary osteons
Definition
form reversal line
Term
arthrology
Definition
study of structures that unite bone
Term
articulation
Definition
to connect or join
Term
synovial joints
Definition
2 bones united by capsule; capsule filled with synovial fluid; highly mobile
Term
joint capsules
Definition
synovial membrane = fibroblasts and underlying CT
Term
types of organization of bone
Definition
circumferential and osteonal
Term
synovial fluid
Definition
secreted by fibroblasts in synovial membrane; highly viscous; lubrication, nutrition, and protection of articular cartilage
Term
main minerals in bone
Definition
calcium and phosphate
Term
free ionized Ca++
Definition
regulates parathyroid hormone secretion
Term
bone hormones
Definition
PTH, vitamin D, and calcitonin
Term
parathyroid hormone (PTH)
Definition
targets bone and kidneys; increases transfer of Ca++ across bone cells; stimulates Ca++ reabsorption by kidneys; inhibits collagen synthesis
Term
vitamin D
Definition
increases Ca++ and phosphate absorption in small intestines and kidneys
Term
calcitonin
Definition
lowers plasma Ca++; increases kidney excretion of Ca++
Term
types of synovial membranes
Definition
fibrous, areolar, and adipose
Term
fibrous synovial membranes
Definition
associated with ligaments and tendons subjected to pressure
Term
areolar synovial membranes
Definition
associated with joints subjected to minimal pressure
Term
adipose synovial membranes
Definition
cover intra-articular deposits of adipose tissue; cushion
Term
joint capsule layers
Definition
fibrous layer and synovial membrane
Term
components of synovial fluid
Definition
glycosaminoglycans, tissue fluid, and various cells (macrophages, sloughed chondrocytes, WBCs)
Term
articular cartilage
Definition
composed of hyaline cartilage
Term
subchondral bone
Definition
typical lamellar bone
Term
perichondrial ring
Definition
where articular cartilage joins metaphyseal bone; contains reinforcing sharpey's fibers
Term
ossification
Definition
sequence of events leading to the formation of bone
Term
intramembranous ossification
Definition
development of non-weight bearing bones
Term
endochondral ossification
Definition
development of weight bearing bone
Term
periosteal bud
Definition
nutrient artery
Term
long bone length
Definition
dependent on interstitial growth of hyaline cartilage
Term
cavitation
Definition
selective cell death creating gaps in bone
Term
ossification centers
Definition
regions of cell death
Term
hypertrophied zone
Definition
most fragile zone of bone growth; most commonly fractured
Term
metaphysis
Definition
portion of diaphysis that flairs out
Term
growth plate closure
Definition
occurs when the rate of removal exceeds the rate of interstitial growth
Term
synarthroses
Definition
fibrous and cartiligenous
Term
fibrous synarthroses
Definition
syndesmosis and sutures
Term
cartilagenous synarthroses
Definition
synchondroses (hyaline - growth plates) and symphyses (fibro - IV discs)
Supporting users have an ad free experience!