a. Any of numerous arthropod animals of the class Insecta, having an adult stage characterized by three pairs of legs and a body segmented into head, thorax, and abdomen and usually having one or two pairs of wings. Insects include the flies, cricke
Insect definition, any animal of the class Insecta, comprising small, air-breathing arthropods having the body divided into three parts (head, thorax, and abdomen), and having three pairs of legs and usually two pairs of wings.
insect bites and stings injuries caused by the mouth parts and venom of insects (see also bee sting).Similar conditions are caused by members of the class arachnida, which includes the spiders, scorpions, ticks, and mites; see also spider bite.
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 bodies, jointed legs, and external skeletons (exoskeletons).
Illustration of insect. insect 1a: 1 labial palpus, 2 maxillary palpus, 3 simple eye, 4 antenna, 5 compound eye, 6 prothorax, 7 tympanum, 8 wing, 9 ovipositor, 10 spiracles, 11 abdomen, 12 metathorax, 13 mesothorax
An insect is commonly called a bug. Flies, bees, and wasps are all insects.
Insect respiration happens without lungs.There is a system of internal tubes and sacs through which gases diffuse or are actively pumped.Air is taken in through openings on the sides of the abdomen called spiracles.