大连医科大学：《组织胚胎学》课程教学课件（英文讲稿）03.Connective tissue

TissueConnective

ContentsConnectivetissueproperLoose connective TDense Connective TAdiposeTReticularTCartilage and boneBlood

 Connective tissue proper Contents  Loose connective T  Adipose T  Dense Connective T  Reticular T  Cartilage and bone  Blood

Common feature and classificationSmall numberofcelllargeamount of intercellularmatrixCell:separateandnopolarityIntercellular matrix:fibersground substanceFilled with B.V., L.V., & N.Originate from mesenchymeFunction:support,connect,nourish,repairdefence etc

• Small number of cell large amount of intercellular matrix • Cell: separate and no polarity • Intercellular matrix: fibers ground substance • Filled with B.V., L.V., & N. • Originate from mesenchyme • Function: support, connect, • nourish, repair defence etc.  Common feature and classification

JClassificationConnective tissue proper:Loose C TDense C TAdipose tissueReticulartisseueCartilageBoneBlood

Connective tissue proper: Cartilage Bone Blood Loose C T Dense C T Adipose tissue Reticular tisseue  Classification

LOOSECONNECTIVETISSUEcollagenfibermast CfibroblsastFat CeosinophilelasticFreticularFmacrophaseplasmaC0OOfibrocytelymphocyteneutrophilCells+Fibers+Groundsubstance

LOOSE CONNECTIVE TISSUE fibroblsast fibrocyte eosinophil macrophase lymphocyte plasma C Fat C mast C neutrophil collagen fiber elastic F reticular F Cells + Fibers + Ground substance

Cellsfibroblastsfat cellsundifferentiated mesenchymal cellsmacrophagesplasma cellsmast cellsleukocytes

fibroblasts fat cells undifferentiated mesenchymal cells macrophages plasma cells mast cells leukocytes  Cells

1.FibroblastsLM:shape:large,flattened cell withprocessesNu: ovoid, large, and pale-staining,witha prominentnucleolus.Cytoplasm:weaklybasophilicEMrich in rough endoplasmic reticulum&ribosome,developedGolgicomplex

LM: 1. Fibroblasts EM shape: large, flattened cell with processes Nu: ovoid, large, and pale-staining, with a prominent nucleolus. Cytoplasm: weakly basophilic rich in rough endoplasmic reticulum & ribosome, developed Golgi complex

Function: synthesizefibers and ground substanceibroblasquiescentactiveFibrocytessmallerthanfibroblastsinactive,lessprocessesturnintofibroblast

Function: synthesize fibers and ground substance Fibrocytes smaller than fibroblasts inactive,less processes turn into fibroblast quiescent active

2.MacrophagesOrigin: monocyteLM吞曦次级溶酶体初级溶酶体微绒毛shape: irregular in shape,short, bluntprocesses(pseudopod)Nu:ovalorkidney-shapedlocated eccentricallycytoplasm:acidophilia空泡吞噬体残余体

Origin: monocyte 2. Macrophages LM shape: irregular in shape, short, blunt processes (pseudopod) Nu: oval or kidney- shaped, located eccentrically cytoplasm: acidophilia

anirregularsurfacewithnumerousprojectionsEMalargenumberofLy.pinosome&phagosomebundlesofmicrotubulesandmicrofilaments

EM an irregular surface with numerous projections a large number of Ly. pinosome & phagosome bundles of microtubules and microfilaments