circulatory system课件

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1、organssystemsEpithelialtissuesConnectivetissuesMuscletissuesNervoustissuesTubularorHolloworgansCompactorparenchymalorgansparenchymainterstitialtissueorgansWell-definedlayerpatternCirculatorySystemheartarterycapillaryveinlymphaticcapillarylymphatic

2、vessellymphaticductcompositionbloodvascularsystemlymphaticvascularsystemfunction:transportnutrient,oxygen,carbondioxideandwastemetabolicproduct…I.ArteryFunction:carrybloodtocapillaryClassification:largearteymedium-sizedarterysmallarteryGeneralstructu

3、re:tunicaintimatunicamediatunicaadventitia1.medium-sizedartery(muscularartery)tunicaintimatunicamediatunicaadventitiaTunicaintima:endotheliumsubendotheliuminternalelasticmembraneTunucamedia:SmoothmusclefibersmainlyTunicaadventitia:externalelasticmemb

4、raneLCTStructuralcharactersofmedium-sizedarteryA.tunicamediaconsistsofsmoothmusclefibersmainlyB.internalandexternalelasticmembranesareprominentC.threelayersaredistinguishedFunctionofmedium-sizedartery:regulatethedistributionofbloodtoeachorgan2.Largea

5、rtery(elasticarteryartery)LargearteryelasticA.AbundantelasticlaminasintheirwallsVentriclecontractsExpandtoholdbloodDecreasethebloodpressureVentricledilatesElasticrecoilKeepbloodflowcontinuouslyMaintainbloodpressureStructuralchractersoflargeartery:A.t

6、unicamediaconsistsofelasticmembranesmainlyB.internalandexternalelasticmembranesarenotprominentC.threelayersarenotdistinguishedFunctionoflargeartery:makediscontinuousbloodfromhearttobecontinuousandflowintomedium-sizedartery3.smallartery(muscularartery

7、)3.smallarterySmallarteryandarteriolemuscularA.Structuralcharacters1.Diameter<1mm2.Presentinternalelasticlamina3.AfewlayersofsmoothmuscleF.4.Noexternalelasticlamina5.Arteriole:diameter<0.3mm1~2layersofsmoothmuscleF.Functionofsmallartery:regulateblood

8、flowtotissueandmaintainbloodpressureComparisonLAMASAinternalnotevidentevidentpresentelasticlaminamediaelasticlaminasS.M.F.S.M.F.externalnotevidentevidentabsentelasticlaminaanothernameelasticA.muscularA.functionII.Capillary:LM---①7~9µm②onelayerofendot