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8 Cards in this Set
- Front
- Back
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Porifera
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Diffusion
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Cnidaria
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Diffusion
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Platyhelminthes
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Diffusion
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Nematoda
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Diffusion
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Mollusca
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Gills or vascularized mantle cavity (land snails)
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Annelida
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Diffusion
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Arthropoda
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Tracheal system (insects), gills (crustaceans) or book lungs (spiders)
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Echinodermata
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Diffusion (through skin or tube feet)
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