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FILO PLATYHELMINTHES
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CARACTERES GERAIS TRIBLÁSTICOS
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CORPO MOLE E FINO , ACHATADO DORSO-VENTRALMENTE
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SIMETRIA BILATERAL
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ACELOMADOS
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EPIDERME
• CILIADA EM TURBELARIA
• COM CUTÍCULAS E ESTRUTURAS PARA FIXAÇÃO EM (TREMATODA E CESTODA
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SISTEMA DIGESTÓRIO
• INCOMPLETO MUITO RAMIFICADO OU AUSENTE
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SISTEMA MUSCULAR• MUSCULOS DESENVOLVIDOS.• ESPAÇOS ENTRE OS ÓRGÃOS
INTERNOS PREENCHIDOS POR PA-RÊNQUIMA (ACELOMADOS)
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AUSÊNCIA DE:
• SISTEMA CIRCULATÓRIO • SISTEMA RESPIRATÓRIO • SISTEMA ESQUELÉTICO
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SISTEMA EXCRETOR
- CÉLULAS-FLAMAS LIGADAS A DUCTOS EXCRETORES
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SISTEMA NERVOSO
• 1 PAR DE GÂNGLIOS ANTERIORES OU 1 ANEL NERVOSO LIGADO A CORDÕES NERVOSOS LONGITUDINAIS
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SISTEMA REPRODUTOR
• SEXUADA:-MONÓICOS-FECUNDAÇÃO INTERNA-DESENVOLVIMENTO DIRETO OU
INDIRETO COM UM OU MAIS ESTÁGIOS LARVAIS
-OVOS COM CASCA
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Escólex e uma proglótide de T.solium
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• ASSEXUADA- REGENERAÇÃO- DIVISÃO TRANSVERSAL
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CICLOS DE VIDA
*MONOGENÉTICOS: HABITAM APENAS 1 HOSPEDEIRO
Ex.: parasitas de peixes (brânquias), anfíbios e répteis
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*DIGENÉTICOS: HABITAM 2 OU MAIS HOSPEDEIROS.
TODOS PARASITAS INTERNOSEx.: Schistosoma, Taenia solium,
Fasciola
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CLASSE: CESTODA
- Geralmente delgados e alongados- Corpo com muitas secções curtas- Sistema Digestivo ausente- Sem cílios - Endoparasitas- Ex.: Tênias
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Outras Doenças causadas por Cestoda:
• Cisto Hidático:
• Transmissor: Echinococcus granulosus
• Adultos: intestino de canídeos
• Larva: homem, porco, carneiro, porco
• Obs.: Cistos larvais podem chegar no tamanho de uma bola de futebol, depois de 12 a 20 anos. Cistos- filhos podem se espalhar por todo o corpo
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CLASSE: TREMATODA
Parasitas, principalmente de vertebrados
- Epiderme sem cílios- Geralmente com 1 ventosa ao redor da
boca e 1 ou mais na superfície ventral- Alimentam-se de tecidos ou líquidos do
corpo do hospedeiro- Ex.: Fasciola hepática (fígado de carneiro)
Schistosoma mansoni
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Ciclo de vida do Schistosoma mansoni
DOENÇA QUE CAUSA:
ESQUISTOSSOMOSE OU BARRIGA D ÁGUA
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OVO
LARVA MIRACÍDIO
CARAMUJO PLANORBÍDEO(Biomphalaria)
LARVA CERCÁRIA
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Ventosa oral
Macho(1cm)
Fêmea
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Ciclo de vida da Fasciola hepatica
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CLASSE: TURBELLARIA
- vida livre- água doce, salgada ou terra úmida- adere à superfície inferior das
plantas submersas, rochas, evitando a luz
- Ex.: planárias (Dugesia sp)
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