1 Phylum Platyhelminthes

2 Flat worms Triploblastic Acoelomate Bilateral symmetry Hermaphroditic –Monoecious One opening for digestive system Paired lateral nerve cords & cerebral ganlion Flame cells

3 MyxozoaMyxozoa ArthropodaArthropoda AnnelidaAnnelida MolluscaMollusca LophophoratesLophophorates HemichordataHemichordata ChordataChordata OtherpseudocoelomatesOtherpseudocoelomates NematodaNematoda PoriferaPorifera CtenophoraCtenophora CnidariaCnidaria PlacozoaPlacozoa PlatyhelminthesPlatyhelminthes NemerteaNemertea CiliophoraCiliophora SarcomastigophoraSarcomastigophora MicrosporaMicrospora ApicomplexaApicomplexa MesozoaMesozoa EchinodermataEchinodermata CrustaceaCrustacea ChelicerataChelicerata UniramiaUniramia ProtochordatesProtochordates

4 Acoelomate EctodermMesodermEndoderm

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6 Phylum Platyhelminthes: Class Turbellaria Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Acoelomate

7 Pseudocoelomate EctodermMesodermEndoderm

8 Coelomate EctodermMesodermEndoderm

9 Nervous System Lateral nerve cord Connectives Auricle Eye spot Cerebral ganglion

10 Brain Auricle Cerebralganglion Paired nerve cords

11 Excretory System Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

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14 Class Turbellaria Eye spots Ciliated surface Regenerate if cut in two Most are free-living

15 Turbellaria Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

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17 Class Trematoda Flukes Parasites Holdfast devices –Most Complex life cycle Intermediate host –Animal with juvenile stage Definitive host –Animal with adult stage

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19 Clonorchis sinensis Oral suckerIntestineUterusYolk gland TestesOvarySeminal recepticle

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21 Clonorchis sinensis Chinese liver fluke 50 million people Cirrhosis of liver Diarrhea Edema Pain

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23 Fascioloa hepatica Sheep liver fluke Sheep, cattle and man –Weight loss Eat vegetation with metacercaria

24 Life Cycle of the Sheep Liver Fluke Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

25 Fasciolopsis buski Intestinal fluke 10 million people Man and pigs Hemorrhage and abscesses of small intestine

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27 Paragonimus westermani Lung fluke Carnivores, pigs, rodents and man May be fatal

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30 Schistosoma Blood flukes 200 million people 1 million deaths/year

31 Life Cycle of a Schistosome Fluke Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

32 Schistosome Cercaria have forked tail

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34 Swimmers Itch

35 Class Monogenea One host Ectoparasites –Mainly fish Opisthaptor –Attachment to host

36 Class Cestoidea Tape worms No digestive system 40 feet long

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38 Scolex

39 Proglottid Uterus Testes Ovary Yolk gland Vas deferens Seminal receptacle

40 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Pork Tapeworm (Taenia solium)

41 Taenia saginata

42 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Source: Redrawn From Centers for Disease Control, Atlanta, GA. Life Cycle of the Broad Fish Tapeworm Diphyllobothrium latum

43 Dipylidium caninum

44 Echinococcus granulosus Parasite of dogs –Host Juveniles in sheep, man and other mammals –Intermediate host Hydatid cyst

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46 Hydatid Cyst Cysticercus –Juvenile stage

47 Adult stage in dog Ecinococcus granulosus

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