大连医科大学：《组织胚胎学》课程教学课件（英文讲稿）04.Bone and cartilage

CartilageBone

ContentsCARTILAGEBoneOsteogenesis

Contents  CARTILAGE  Osteogenesis  Bone

CARTILAGEFeaturesCartilage:Cartilagetissue+ perichondriumg.s=semi-solid&semi-rigidCartilagetissue:B.V.,Nochondrocytes + matrix (fibers+ g.s.)lymphaticsnerves

CARTILAGE Cartilage: Cartilage tissue + perichondrium Cartilage tissue: chondrocytes + matrix (fibers+ g.s.) Features g.s = semi-solid & semi-rigid No B.V., lymphatics nerves

Types of cartilage:(Onthebasisofcharacteristicsofthe matrix)hyaline cartilageelastic cartilagefibrocartilageoh

Types of cartilage: (On the basis of characteristics of the matrix ) hyaline cartilage elastic cartilage fibrocartilage

I. Hyaline CartilageLocation:embryonic skeleton,articular surfacesrib cartilage, larynx,tracheaetc.Structure:Ground substances-a firm, hydrated gel·HE: basophilic

I. Hyaline Cartilage Location: embryonic skeleton, articular surfaces, rib cartilage, larynx, trachea etc. Structure: Ground substances •a firm, hydrated gel •HE: basophilic

Components:FibersCollagenousfibrilinvisibleinLM(delicate&samerefractiveindexastheg.s.)G.S: firm hydrated gelproteoglycansglycoproteinslacunae:matrixcavityChondrocytesLocated incartilage lacunae(basophilic)

Components: Fibers Collagenous fibril invisible in LM (delicate & same refractive index as the g.s.) G.S: firm hydrated gel proteoglycans glycoproteins lacunae: matrix cavity Chondrocytes Located in cartilage lacunae (basophilic) cap

LMchondrocytesyoung chondrocytes:at the periphery;less mature;elliptic;single;differetiationCentral chondrocytes:in the deep part; moremature; round;isogenousgroupbasophilic;Nu.round orelliptic withnucleolusisogenousgroupThesecellsareoriginatingfrom mitotic divisionsofasinglechondrocyte

chondrocytes LM young chondrocytes: at the periphery; less mature; elliptic; single; differetiation Central chondrocytes: in the deep part; more mature; round; isogenous group basophilic; Nu. round or elliptic with nucleolus isogenous groupThese cells are originating from mitotic divisions of a single chondrocyte

Chondrocytes·Function:·EM:synthesizef.&g.s? RER, large Golgi

Chondrocytes •EM: • RER, large Golgi. •Function: • synthesize f. & g.s

Perichondrium:Dense C.T.Outer layer: morecollagenous fibersInner layer:more b.v.chondroblast.Function:protection,nutrition,repairing

Perichondrium: Dense C.T. Outer layer: more collagenous fibers Inner layer: more b.v. chondroblast •Function: protection, nutrition, repairing

ReviewCartilage TissuechondrocytesComponentsfibersmatrixsemi-solidG. Ssemi-rigid

Review Cartilage Tissue Components chondrocytes matrix fibers G. S semi-solid semi-rigid