They are the largest group within the arthropod phylum 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). To be sure an insect is an insect, we have to look at a combination of features B, the malaysian stick insect, has three body parts, six legs, wings, and a pair of antennae You learned about what makes an insect an insect, looked closely at an animal, and applied what you learned to identify insects from other animals.
All insects belong to the phylum arthropoda But unlike other arthropods—like lobsters, spiders, or millipedes—insects have three pairs of jointed legs, segmented bodies, an exoskeleton, one. What exactly is an insect To begin, insects don't have a vertebral column (backbone) like people have and therefore are considered to be a type of invertebrate animal Instead of a backbone, insects have a hard exterior body covering, called an exoskeleton Invertebrate animals that have an exoskeleton, a segmented body, and jointed appendages
Without insects as pollinators, we would have far fewer flowering plants. More than half of all the animal species described by science are insects, and it is estimated that there are more than five million extant species That’s a lot of beetles, butterflies, moths, ants, bees, wasps, flies, termites, crickets, grasshoppers, cockroaches, mantids, dragonflies and earwigs, to name just some of the more familiar ones. As you may remember from elementary school, the most basic definition of an insect is an organism with three pairs of legs and three body regions
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