Dec 22, 2025 · insect, (class Insecta or Hexapoda), any member of the largest class of the phylum Arthropoda, which is itself the largest of the animal phyla. Insects have segmented …

INSECT meaning: 1 : a small animal that has six legs and a body formed of three parts and that may have wings often used before another noun; 2 : an animal (such as a spider) that is …

Introduction The insects are the largest group of animals. In fact, about 75 percent of all animals are insects. Insects developed on Earth long before humans did. Today there are about 1 …

Nov 23, 2025 · Insect - Thorax, Wings, Legs: The insect thorax has three segments called the prothorax, mesothorax, and metathorax. Locomotion is affected by muscles acting on the …

Nov 11, 2025 · Social insect, an insect that lives in colonies and manifests group integration, division of labor, and overlap of generations.

Dec 10, 2025 · entomology, branch of zoology dealing with the scientific study of insects. The Greek word entomon, meaning “notched,” refers to the segmented body plan of the insect. …

Most insects have two pair of wings, although flies use only the first pair and beetles only the second. The two wings on a side are usually moved together, but in the dragonfly they work …

In entomology, a nymph is a sexually immature insect that is usually similar to the adult form. Nymphs are found in such insects as grasshoppers and cockroaches, which have incomplete, …

Dec 26, 2025 · Fleas are small, wingless insects with a tough cuticle bearing many bristles and frequently combs (ctenidia) of broad, flattened spines. The adult flea varies from about 0.1 to …

The outer covering, or exoskeleton, of an adult insect is made of a tough substance called chitin that cannot stretch or grow bigger. The larvae of many insects, such as grasshoppers, have …