肥大細胞作用巨噬細胞功能巨噬細胞肥大細胞巨噬細胞英文巨噬細胞紅血球巨噬細胞t細胞巨噬細胞大小工作細胞巨噬細胞巨噬細胞動畫吞噬細胞巨噬細胞巨噬細胞活化巨噬細胞癌細胞巨噬細胞發炎巨噬細胞是什麼

細胞小知識 - 長春藤生命科學

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免疫細胞是什麼？保護人體不被病菌侵擾 · 巨噬細胞(Macrophage)：白血球中最大的細胞，約占總血球5%，能像變形蟲般蠕動，將異物吞噬分解。

· 淋巴球(Lymphocyte)：接收由巨噬 ...  CellFYIWhatareimmunecells?Protectthehumanbodyfrombeinginfestedbygerms Specificimmunecells:Tcells,Bcells Immunecellsarethegeneraltermforcellsthatparticipateintheimmuneresponseinthehumanbody.Whenthebodyisinvadedbyvirusesorbacteria,immunecellscanrecognizeantigens,andtheninitiatethebody'simmuneresponsetoprotectthebodyfromillness.Immunecellscanbedividedintothreetypes:specificimmunecells,non-specificimmunecellsandantigenpresentingcells.   SpecificimmunecellsincludeTcellsandBcells,whichhaveamemoryfunctionintheimmuneresponse,canrememberdifferentantigens,andmakeatargetedimmuneresponseagainsttheantigen.   Non-specificimmunecells:NKcells,macrophages,neutrophils,mastcells Non-specificimmunecellsarethefirstlineofdefenseofthehumanimmunesystem.Theycanidentifymultipleantigensanddestroyinvadingbacteria,buttheycannotmakespecificimmuneresponsesagainstdifferentantigens.Macrophages,neutrophils,NKcells,mastcells,etc.areallnon-specificimmunecells.   Antigenpresentingcells:dendriticcells,macrophages,Bcells Helpcapturetheantigeninthehumanbody,presenttheantigentoTcells,andstrengthentheabilityofTcellstorecognizeantigens.Dendriticcells,macrophagesandBcellscanallplaytheroleofantigenpresentation.Simplyput,immunityisthebody'sdefensemechanism.Whenthehumanbodyencounters"foreignbody"invasion,ifitisallowedtoproliferateinlargenumbers,itwillcausedisease.Whitebloodcellsusuallypatrolthebodytomonitoranysubtlereactions.Onceaforeignbodyinvades,theimmunesystemwillsendout"soldiers"toquicklycollectintelligence,organize"armies"toresistforeignenemies,andeliminatethemwhennecessary.Inotherwords,soldiersmusthavetheabilitytodistinguishbetween"self"and"non-self."Thisisthewonderoftheimmunesystem.Aslongasdiscernmentandresistancecanwork,peoplewillnotgetsick.Therefore,oncetheimmunityisreduced,variousdiseaseswilleasilyfollow. ​Whitebloodcellsplayaroleinmonitoringforeignbodiesinthebodyandkillinggermsandcancercellsinthehumanbody.Whichisdividedinto: ​ Macrophage(macrophage):Thelargestcellinwhitebloodcells,accountingforabout5%ofthetotalbloodcells,canwrigglelikeanamoebatoswallowanddecomposeforeignbodies. ​ Lymphocytes:Receivingcommandsfrommacrophages,somecellsreleaseadhesivemoleculestofightforeignbodiesandproduceantibodies. ​ Granulocytes:Aftertheforeignbodyiswrappedinamembrane,itisdigestedanddecomposedbyenzymesandactiveoxygentostrengthenthepowerofmacrophagestoswallowtheforeignbody. ​ ​ Firstofall,macrophageswillmeasurethesizeoftheforeignbody.Iftheforeignbodyistoosmalltobeswallowedbythepellet,themacrophagewillissueanattackcommandtothelymphocyte.Afterthelymphocytefindsaforeignbody,itreleasesadhesivemoleculestocaptureandprocesstheforeignbody.Somelymphocyteswilllabelforeignbodiesas"antigens",andthelymphocytescanbeprocessedfirstwhenthesameantigeninvadesnexttime.Lymphocytesalsoinclude:Tcells,BcellsandNKcells. Tcells:playtheroleofcommander-in-chief,responsibleforreceivingandsendingcombatmessages,accountingfor70-80%ofperipheralbloodlymph; Bcells:Speciallyproduceantibodiestodealwithforeignbodiesinthebody,accountingforabout5-10%; NKcells:non-specificcytotoxicity,accountingforabout15-20%.Backtotop 

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