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[[File:|thumb|A spider]]
Invertebrate is a kind of animal that does not have a spinal column or backbone. It is the opposite of vertebrate, that means if an animal is not a vertebrate (fish, reptile, amphibian, bird, or mammal), it is an invertebrate.
The main phyla of invertebrate animals are:
Insects have no bones, but they have a skeleton on the outside of their bodies that scientists call an exoskeleton. It is like our skin, only it is hard.
There are 18 more phyla of invertebrates, mostly minor: see List of animal phyla.
Here are sentences from other pages on Invertebrate, which are similar to those in the above article.
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