Download - Moluscos e equinodermos
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Quem são? Como são?
Onde vivem?
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Gastrópodes (Garry)
Cefalópodes (Lula)
Bivalves
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Quanto ao desenvolvimento
embrionário: são triblásticos
São Protostômios
Celomados (celoma verdadeiro)
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Tubo digestivo COMPLETO e
digestão EXTRACELULAR
Respiração: na maioria BRANQUIAL
Cavidade Paleal*
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Corpo dividido em CABEÇA + MASSA
VISCERAL + PÉ.
Exoesquelto calcário: externo ou
interno (carbonato de cálcio)
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Rádula: Estrutura característica de
alguns moluscos.
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Circulação: feita por lacunas
chamadas hemoceles
Sistema nervoso: GANGLIONAR
Reprodução Sexuada (alguns podem
ser hermafroditas)
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Obs*
Os bivalves (ostras e mexilhões) são
utilizados como bioindicadores de
poluição, pois são filtradores.
CUIDADO AO COMER NA PRAIA!
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Equinodermos Simetria PENTARRADIAL
São marinhos e de vida livre (com exceção dos crinóides, que são fixos no substrato rochoso)
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Asteróides: estrela- do-mar
Ofiuroides: Serpentes do mar
Crinoides: Lírios do mar
Holoturoides: pepinos do mar
Equinoides: ouriço-do-mar e bolacha-da-praia
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Obrigada!