Insect - Wikipedia
Insects (from Latin insectum) are hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of jointed legs, compound eyes, and a pair of antennae.
昆虫纲 - 百度百科
昆虫纲，是节肢动物门中最大的一纲。 其体分头、胸、腹三部；头部具触角1对；胸部三节，每节有足一对；中胸和后胸节通常有翅各一对；腹部除末端数节外，附肢多退化或无；每节腹面两侧各生足一对，由基、转、股、胫、跗五节组成；末端有爪，有的爪上有爪间垫，有爪间刺；中胸和后胸上通常各生有一对翅。 [5] 昆虫纲分布范围很广，除海洋的水域之中以外，凡有植物生长的地域都有昆虫。 昆虫纲具有强大的飞翔能力，其微小的身躯又易随气流传播，所以从赤道到两极 …
Insect | Definition, Characteristics, Types, Beneficial, Pest ...
2024年10月22日 · Insect, any member of the class Insecta, the largest class of phylum Arthropoda. Insects have segmented bodies, jointed legs, and exoskeletons. They are distinguished from other arthropods by their body, which has three major regions: the head, the three-segmented thorax, and the many-segmented abdomen.
Insects - Insecta - The Animal Encyclopedia - ThoughtCo
2019年7月3日 · Insects (Insecta) are the most diverse of all animal groups. There are more species of insects than there are species of all other animals combined. Their numbers are nothing short of remarkable — both in terms of how many individual insects there are, as well as how many species of insects there are. In fact, there are so many insects that ...
Class Insecta | Department of Entomology
Insects are the most abundant life form known to science. Approximately 1,000,000 species have been described, more than all other known organisms combined! Most of these insects are harmless to humans with only ~10,000 species ever considered to be some sort of pest. Only 1,000 are classified as serious pests.
Insects: The Ultimate Guide. Pictures, Facts & Info For Kids
2019年10月16日 · Facts, pictures and information on Insecta – the largest class of animals on Earth. Discover the characteristics of insects, their life-cycles, the roles they play in their ecosystems, and why they are so important for life on Earth…
Classification of insects | Britannica
insect, Any member of the class Insecta, the largest arthropod class, including nearly 1 million known species (about three-fourths of all animals) and an estimated 5–10 million undescribed species. Insect bodies have three segments: head, thorax (which bears three pairs of legs and usually two pairs of wings), and many-segmented abdomen.
Class Insecta - Insects - BugGuide.Net
2023年9月13日 · Holometabolous insects (Endopterygota or Holometabola) have a four-stage life cycle: egg, larva, pupa, and adult (imago). All the winged insects (including those who have lost their wings over the course of history) constitute a taxon called Pterygota (sometimes treated as a …
Insects | The Biodiversity Group
Insects are the largest and most diverse group of organisms on Earth. There are approximately 30 orders with the number of described species reaching nearly 1 million. However, some scientists believe the actual number may exceed 20 million!
Insect - New World Encyclopedia
Insects are invertebrate animals of the Class Insecta, the largest and (on land) most widely distributed taxon (taxonomic unit) within the Phylum Arthropoda. Insects comprise the most numerous and diverse group of animals, with around 925,000 species described.