《淋巴系统解剖》ppt课件

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1、CH23:TheLymphaticSystemGoalsDiscusstheorganizationofthelymphaticsystem,includingthevessels,principallymphnodes,thymus,andspleenExplaintherelationshipbetweenthelymphaticandcirculatorysystems,andtheroleoflymphoidtissuestructuresandlymphocytesinthebody’sdefenseAccessorytocardiovascularsyste

2、mtherearetwodrainagesystemsOverviewoftheLymphaticSystemIncludes,vessels,fluid,andnodesornonsecreting"glands".Lymphaticvesselsconveyfluidfromtheperipherytotheveins.Thefluid,lymph(=clearspringwater),iswhatseepsoutofthebloodattheperipheralcapillaries.Compositionissimilartoplasmawithoutthep

3、roteinsLymphaticorgansortissues("glands")arefilteringareasandarenasoflymphocytematurationandcompetency.MajorFunctionsofLymphaticSystemFiltrationoflymphReturnofseepedfluidtoc.v.system“Education”andproductionofimmunesystemlymphocytesTransportofdigestedlipidsfromsmallintestinallactealsLymph

4、CapillariesThinwalledendothelium(noBM)withperiodiconewayvalves.Ingeneraltheyparallelveins.ClosedendsallowfluidflowinwardonlyPickupandrecycleextratissuefluidLymphcirculationdueto?ComparetoFig.23.2LocationofLymphCapillariesEverywhere,exceptforCNSandbonemarrow,aswellascorneaandcartilage.Spe

5、cialsetoflymphcapillariesinvilliofsmallintestine=LactealsDamagedvalvesorblockedlymphvessels???LymphaticvesselscomparableinstructuretoveinsLymphcapillariesconvergetobecomecollectingvesselsandendupaseitherThoracicductorrightlymphaticductThoracic(leftlymphatic)ductLeftsubclavianveinRightlym

6、phaticductRightsubclavianveinCysternaChyliFig23.4largestLymphocytesAgranulocytes-largenucleiandsmallamountofcytoplasmFunctioninidentificationandinactivation/destructionofpathogensTypesofLymphocytesTCells-cellularimmunity-specificforpreviouslyidentifiedpathogensTHelper,TKiller,TSuppressor

7、,andmemorycellsBCells-humoralimmunity-plasmacellsproduceantibodiesspecifictotheantigenorpathogen;memorycellsNKcells-non-specific,provideimmunologicalsurveillanceBoneMarrow:LymphopoiesisLymphocytesarelateralsoproducedinthymus,spleenandtonsilsFig23.7122C.t.loadedwithLymphoc