Classification of insects These organisms belong to the kingdom of animals, the family of arthropods (animals that have a notochord during embryonic formation), class of six-legged. [3] The most important characteristics of insects The most important thing that distinguishes insects from other animals is what follows: [4] Insects have a divided body; As it is divided into 3 parts: the head, the thorax, and the abdomen. The body.[5] It has an external skeleton, and it lacks a backbone. Its structure consists of a hard, inflexible substance called chitin. This structure provides protection for insects. [5] It has wings consisting of two layers, main wings, and hidden wings, which are smaller in size. [5] It has antennae.
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