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Animal Diversity

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Body cavity
Digestive Tract
Circulatory System
Protostomes   Platyhelminthes, Rotifera, Nematea, Annelida, Mollusca          
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Proto:Platyhelminthes   Flat worms     None   Dead-end sac   None  
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Proto:Rotifera   Rotifers     Pseudocoelom   Complete   None  
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Proto:Nemertea   Ribbon worms     Coelom   Complete   Closed  
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Proto:Annelida   Segmented: Earthworms, leaches   Earthworms, leaches   Coelom   Complete   closed or open  
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Proto: Mollusca   Mollusks: Polyplacophora, Bivalvia, Gastroposa, Cephalopoda     reduced coelom   Complete   open except in cephalopods  
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Proto:Mollusca:Mollusks:Polyplacophora   Chitons          
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Proto:Mollusca:Mollusks:Bivalva   Clams          
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Proto:Mollusca:Mollusks:Gastropoda   Snails, slugs, limpets          
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Proto:Mollusca:Mollusks: Cephalopoda   Cephalopoda   Squid, octo,nautiionds        
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Proto:Custacea   Crabs,, shrimps, lobsters   (blank)        
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Proto:Hexapoda   Insects   (blank)        
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Proto:Myripoda   Millipedes, centipedes   (blank)        
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Deuterostomes   Chordata   Chordates        
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Deu:Chordata:Chordates   Cephalochordate   Lancelets        
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Deu:Chordata:Chordates   Angnatha   Lampreys, hagfish        
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Deu:Chordata:Chordates   Chondrichthyes   cartilaginous fishes        
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Deu:Chordata:Chordates   Osteichthyes   Bony fish        
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Deu:Chordata:Chordates   Amphibian   Frogs        
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Deu:Chordata:Chordates   Reptilian   Reptiles        
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Deu:Chordata:Chordates   Aves   Birds        
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Deu:Chordata:Chordates   mammalia   Mammals        
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