Helminths - Helminths belong to 2 phyla: Playhelminthes...

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Unformatted text preview: Helminths belong to 2 phyla: Playhelminthes (flat worms) which includes the trematodes (flukes) and cestodes (tape worms) Nematoda (round worms) General Characteristics Multicellular animals Possess digestive, circulatory, nervous, excretory and repoductive systems Complex life cycle Multiple hosts for each stage of development Variable sex schemes Dioecious - male or female organisms in one organism Monoecious - hermaphoroditic Parasitic Helminth Characteristics May lack a digestive system Reduced nervous system Reduced or lacking means of locomotion Complex reproductive systems Platyhelminths Trematodes The Flukes have both ventral and oral suckers. One to hold in place, one to eat Given common names according to tissues in which the adult lives (liver, lung, blood) Clonorchis sinensis Life Cycle of Paragonimus westermani...
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Helminths - Helminths belong to 2 phyla: Playhelminthes...

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