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There are 15 phyla of animals, and each phylum contains animals that have a combination of characteristics that animals in other phyla do not have. The phylum Arthropoda are the animals with jointed legs, segmented bodies, and a tough or hard outer covering that also serves as their skeleton (exoskeleton). Insects have these characteristics, so they belong to Phylum Arthropoda, but so do millipedes, Spiders, ticks, crabs, lobsters, and crayfish, which are not insects.

The class Insecta, or insects, are the Arthropoda that have three pairs of legs, a segmented body divided into three regions (head, thorax, and abdomen), one pair of antennae and, usually, wings. Other Arthropoda classes have more than three pairs of legs and only one or two body regions, and they never have wings. Other common classes of Arthropoda are Crustacea (such as sowbugs, crayfish, crabs), Diplopoda (millipedes), Chilopoda (centipedes), and Arachnida (such as spiders, ticks, mites, scorpions).

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13y ago
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12y ago

Insects have 6 legoiuytre s and birds have 2.

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14y ago

insects are animals

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Q: What is the difference between an insect and an animal?
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