~ Insects in a narrow sense refer to the animals of Insecta in the kingdom of invertebrates and arthropods, and hexapods (including the original tail, rebound tail, double tail and insects) are collectively called insects. [1] Among all living things, the group with the largest number of species is the most prosperous animal in the world, with more than 1 10,000 species found. Its basic characteristics are head, chest and abdomen, two pairs of wings and three pairs of feet; 1 The pair of antennae are born in the head and the bones are wrapped in the body; Life forms have changed a lot, all over the world. The following entry is mainly about insects. See "Insects" for details. However, arthropods are not all insects in a narrow sense. For example, rodents are a subclass of Crustacea. However, rats and women are not insects, because insects refer to invertebrates of Insecta and Arachnida in a narrow sense, so "insects" that do not belong to Insecta and Arachnida are insects in a broad sense rather than in a narrow sense. In a broad sense, it can be used as a general term for some organisms, not limited to arthropods. Such as flagellates, theropods and ciliates in protozoa; Mushrooms, tapeworms, trematodes, etc. At the Platycladus orientalis Gate. There are also larvae of coelenterates, but they are not insects.