白细胞和免疫系统

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1、Blood,LymphandImmuneSystemsChapter10Bloodhem/oandhemat/oplasma-55%formedelements-45%serum-plasmawithoutclottingproteinsBloodCellsRBC-erythrocytes-erythropoiesisWBC-leukocytes-leukopoiesisPlatelets-thrombocytes-thrombopoiesisErythrocyteserythr/o-redcyte-cellHemoglobin-bloodproteintransportsoxy

2、genReticulocyte-immatureerythrocyteRBCsproducedbyredbonemarrowLeukocytesleuk/o-whiteProtectthebodyagainstinvasionPassthroughcapillarywallsGranulocytesneutrophils(phagocytosis)eosinophils(allergies)basophils(promoteinflammation)Agranulocyteslymphocytes(productionofcirculatingantibodies)monocyt

3、es(macrophages)Collectionofdeadandlivingbacteriaandleukocytescalledpus,abscess.ThrombocytessmallestformedelementmadeinbonemarrowessentialtobloodcoagulationIfinjury,bloodcomesincontactwithanytissueotherthantheliningofthevessels,plateletssticktogether,formplug,sealswound.Chemicalsreleased,serie

4、sofreactions,formationofclot.Plasmaplasma92%water8%plasmaproteinsalbuminglobulinfibrinogenserum-plasmawithoutclottingproteinsorfibrinogenFunctionsoftheImmuneSystemToprotecttheentirebodyfromavarietyofharmfulsubstancespathogenicmicroorganismsallergenstoxinsmalignantcellsStructuresoftheImmuneSys

5、temUnlikeotherbodysystems,ImmuneSystemisNOTcontainedwithinasinglesetoforgansorvesselsActiondependsonstructuresfromlymphatic,cardiovascular,andIntegumentarysystemsWorksprimarilythroughantigen-antibodyreactionLymphaticSystemMajorstructureslymphvesselslymphnodeslymphfluidtonsilsAlsospleenthymusF

6、unctionsoftheLymphSystemlymph/odrainfluidfromtissuespacesandreturntoittothebloodtransportmaterials(nutrients,hormonesandoxygen)tobodycellscarryawaywasteproductstothebloodtransportlipidsawayfromdigestivesystemcontrolofinfectionLymphSystemLymphoriginatesinbloodplasmaInterstitialfluidcleansandno

7、urishesbodytissuescollectscellulardebris,bacteriareturntobloodorlymphcapillariesLymphNodeslocatedinlymphvesselssmallroundorovalstructures(filters)depositoriesforcellulardebrisbacteriaanddebrisphagocytizedLymphNodesinsidearemassesoftissuewhich