Describe the types of circulatory system found on non-chordates
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fishes have 2-chambered heart with 1 atrium and 1 ventricle .amphibians and reptiles except crocodiles have a 3-chambered heart with 2 atria and 1 ventricle .crocodiles ,birds posses 4-chambered heart with 2-atria and 2 ventricles .
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