Cartilage and bone Flashcards
what fetal cells does cartilage and bone differentiate
mesenchyme cells
what are the three cells active in the matrix
fibroblast
chondroblast
osteoblast
what are the three resting cells
fibrocyte
chondrocyte
osteocyte
where do resting cells reside
lacunae
what do fibroblasts do
produce collagen
what do chondroblasts do
produce cartilage
what do osteoblasts do
produce bone
what do osteoclasts do
breakdown bown
what is cartilage
firm extracellular chondrin matrix
sulphated mucopolysaccharide gel intermeshed with type II collagen fibres
no nerves, rarely any blood vessels
often surrounded by the perichondrium
what does the fibres and gel resist
fibres resist tension
gel resist compression
what is collagen laid down by
chondroblasts
what are the four types of cartilage
Hyaline skeletal
elastic skeletal
fibrocartilage
articular cartilage
hyaline skeletal
simplest, may mineralise in old age
found upper respiratory tract, ventral ribs
elastic skeletal
contains elastin fibres
found external ear, upper respiratory tract
Fibrocartilage
alternating layers of hyaline cartilage and collagen
found: intervertebral discs, symphyses, scuta, labra, menisci, discs
