+An **invertebrate** is an animal that lacks a [backbone](/wiki/backbone) or vertebral column. This immense and varied group constitutes the vast majority of all known [animal](/wiki/animal) species, inhabiting every corner of the planet.
+## See also
+- [Arthropod](/wiki/arthropod)
+- [Mollusc](/wiki/mollusc)
+- [Insect](/wiki/insect)
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