FISH

These are the:

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AMPHIBIANS

These are the:

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REPTILES

These are the:

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AVES

These are the:

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MAMMALS

These are the:

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Have a back bone

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Excrete with a kidney

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Have an advance nervous system with complex sense organs

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Gas exchange through gills

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Gas exchange through lungs

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Some gas exchange across the skin

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Must lay eggs in water

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Can lay eggs on land

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External fertilization

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Internal fertilization

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Two chambered heart

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Three chambered heart

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Four chambered heart

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Single loop circulatory system

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Double loop circulatory system

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Have smooth moist skin

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Have scaly skin

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Have feathers

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Hollow highly porous bones that are very light

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One way air flow respiratory system

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Internal development of a fetus

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Ectothermic

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Endothermic

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Move air into and out of the lungs with a diaphragm muscle

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