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Animal Diversity Web
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Introductory Information from Fact Monster
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"Animals with an internal skeleton made of bone are called vertebrates."
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Check the BrainPOP Science movies about Invertebrates and Vertebrates.
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There are many different animal classes and every animal in the world belongs to one of them. The five most well known classes of vertebrates (animals with backbones) are mammals, birds, fish, reptiles, amphibians. They are all part of the phylum chordata -- I remember "chordota" by thinking of spinal chord.
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"Of the million or more animal species in the world, more than 98% are invertebrates. Invertebrates don't have an internal skeleton made of bone."
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Fast Facts
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Information about many different invertebrates from Enchanted Learning.
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One of Two Major Animal Groupings
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Field guides. Search more than 5500 species for information.
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