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Fibers
LacunaeIsogenousGroup
Chondrocytes Matrix
Fibers(collagen Type II,
elastic)
Ground Substance(hyaluronic acid,
chondroitin sulfate,keritin sulfate,
60-70% H2O)
Cartilage
Properties of Cartilage
1. Avascular
2. Permeable(conducts nutirents
and water)3. Flexible but Weight-Bearing
(resistance to compression)
4. Elasticity and Resiliency
5. Resistance to Shear Forces
6. Slippery(low friction at articular joints)
7. Poor Regenerative Capacity
Hyaline CartilageMatrix (amorphous & glassy)
hyaluronic acidchondroitin sulfatekeratin sulfateH2O (60-78%)
Fibers- collagenous(invisible due to samerefractive index as matrix)
Typical Locations
intercostals (connect ribsto the sternum)
wall of trachea & bronchii
articular cartilage of bone
epiphyseal plate
Hyaline Cartilage
Hyaline Cartilage (SEM)
lacunamatrix
chondrocyte nucleus
fetal axial skeleton
Fibrocartilage
Matrixhyaluronic acidchondroitin sulfatekeratin sulfate
Fibersdense collagenous
bundles
Typical Locations
intervertebral discspubic symphysis
meniscus of knee joint
attach tendons to bone
Properties
resistance tocompression andshear forces
Fibrocartilage- longitudinal section
Fibrocartilage- transverse section
Fibrocartilage- SEMcollagenous fiber bundles
Elastic Cartilage
Matrix
hyaluronic acidchondroitin sulfatekertatin sulfate
Fiberselastic (elastin)
Typical Locations
external earwalls of externalauditory canal andeustachian tubesepiglottis & larynxbridge of nose
Properties
resiliency andpliability
Elastic Cartilage- pinnae of ear
Elastic Fibers- silver stain
Elastic Fibers(resorcin-fuchsin stain)
Growth of Cartilage
fibroblasts collagen
blood vesselchondroblasts
hyalinematrix
isogenousgroups(nests ofchondrocytes)
perichondrium
Appositional Growth
(peripheral mitosisand differentiationof fibroblasts)
InterstitialGrowth
(mitosis of chondro-cytes and depositionof new matrix)
Perichondrium
Territorial Matrix