7000-
2)Cartilage matrix--groundsubstance:(Amorphouscomponentproteoglycan:--sametoloose CT--thereare morechondroitinsulfate distributed at theperiphery of cartilagelacuna---called ascartilagecapsule(basophilic)chondronectinwater---fiber(Formed component):type and number of fiber depends on the type ofcartilage
2) Cartilage matrix -ground substance: (Amorphous component) • proteoglycan: -same to loose CT -there are more chondroitin sulfate distributed at the periphery of cartilage lacuna-called as cartilage capsule(basophilic) • chondronectin • water -fiber (Formed component): type and number of fiber depends on the type of cartilage
3.PerichondriumAlayer of dense irregular connectivetissue.two parts:-outerlayer(adjacenttosurroundingC.T.)morefibres,fibroblastsinnerlayer (adjacentto cartilage matrix)4more cellswhichformcartilage*wellvascularised设serve as nutrients andregenerationFunction:protection, nutrition, repairing
3. Perichondrium A layer of dense irregular connective tissue. Function: protection, nutrition, repairing two parts: - outer layer (adjacent to surrounding C.T.) more fibres, fibroblasts - inner layer (adjacent to cartilage matrix) * more cells which form cartilage * well vascularised * serve as nutrients and regeneration
4. Classification of cartilage:accordingto thefiberHyaline cartilage:most common, much type ll collagenElastic cartilage:elastic fibers,typeIl collagenFibrocatilage:dense network of typeI collagen;high stress and weight bearing
4. Classification of cartilage : according to the fiber Hyaline cartilage: most common, much type II collagen Elastic cartilage: elastic fibers, type II collagen Fibrocatilage: dense network of type I collagen; high stress and weight bearing
DHyalinecartilage:nose,larynx,ribs,sternum,articular surface,ribcartilage,tracheaand bronchi.Collagenousfibril(D=10-20nm)invisibleinLM(delicate &same refractive indexas theg.s.)
1)Hyaline cartilage: • nose, larynx, ribs, sternum,articular surface, rib cartilage, trachea and bronchi. • Collagenous fibril (D=10-20nm) invisible in LM. (delicate & same refractive index as the g.s.)