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1、Section3IntroductiontoTapewormAppearance:flattened,banded.Scolex,neckandstrobilaColor:milkySize:afewmillimeterstomorethan10meters 1.Morphology1.Immature segment2.Mature segment3.Gravid segment1.Thebodyisflatandlong,dividedintosections,eachsectionhasitsownreproductiveorgans2.Nomouthanddigestivetract,
2、completelyrelyonbodysurfacetoabsorbnutrients3.Thefixedorgansareconcentratedatthehead(sucker,smallhook,bothriate)CharacteristicsoftapewormsStrobilaReproductivesystemHermaphroditeReproductivesystemmodel2.ClassificationCestoideaCestodariaEucestodaPseudophyllideaCyclophyllideaCyclophyllideaTaeniidae:Tae
3、nia Echinococcus Hydatigera VersteriaAnoplocephalidae:Moniezia Anoplocephala Paranoplocephala Avitellina ThysanieziaDavaineidae:Davainea Raillietina Cotugnia HouttuyniaDipylidiidae:Dipylidium Amoebotaenia ChoanotaeniaHymenolepididae:Hymenolepis Drepanidotaenia FimbriariaMesocestoididae:Mesocestoides
4、Paruterinidae:Paruterina Anonchotaenia Biuterina Cladotaenia3.DevelopmentIntermediatehostFinalhostdigestivetractAdultEnvironmentEggCysticercoid(arthropod)Cysticerus(mammal)MetacestodeDevelopmentofCyclophyllideaEggMonieziaDipylidiumTaeniidaeCyclophyllideaMetacestodeCysticerusCysticercustenuicollisCysticerusConcavescolexExtendedscolex多头蚴CoenurusConcavescolex（protoscolices）棘球蚴HydatidcystprotoscolicesCysticercoid(arthropod)Concavescolex