Some dont have noses, but they have an acute sense of smell, some have no lungs but they need oxygen to survive, others have no ears but they are very sensitive to vibrations. They have ears under their knees and gills beneath their stomachs and breathing tubes on their side. They seem to have hundreds of legs and just looking at them can give you the creeps. Insects are in the taxonomic class Insecta. They are primarily small invertebrate animals usually characterized by three pairs of jointed legs, two pairs of wings, an exoskeleton, a thorax, an abdomen, and a segmented body consisting of a head equipped with sucking, piercing, or biting mouth parts called mandibles, two antennae, and compounded eyes.
Insects hatch from eggs and many undergo metamorphosis.
They work harder, jump higher, lift a larger percentage of their mass, and can out fly us any day. Insects are an important source of food for reptiles, birds, fish, and some mammals. Without insects these creatures would die of starvation. Insects also help us by recycling dead organic matter. If they did not do this, the matter would accumulate into disgusting piles and would kill plants and small animals.