Vertebrates and Invertebrates

Vertebrates and Invertebrates

Animal Diversity Web

Introductory Information from Fact Monster

"Animals with an internal skeleton made of bone are called 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.

"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."

Fast Facts

One of Two Major Animal Groupings

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