Question

Do Insects have lungs?

Answer 1

Hint: The lungs are a pair of air-filled, spongy organs on either side of the chest (thorax). Through its tubular branches, known as bronchi, the trachea (windpipe) transports inhaled air into the lungs. The bronchi divide further into smaller and smaller branches (bronchioles) until they are microscopic.

Complete answer:
Insects, also known as Insecta, are pancrustacean hexapod invertebrates that make up the majority of the arthropod phylum. A chitinous exoskeleton, a three-part body (head, thorax, and abdomen), three pairs of jointed legs, compound eyes, and one pair of antennae are all features of insects. Insects are the most diverse group of animals, with over a million described species accounting for more than half of all known species.
Almost all insects are born from eggs. The inelastic exoskeleton restricts insect growth, and development is a series of molts. In those groups that undergo four-stage metamorphosis, the immature stages often differ from the adults in structure, habit, and habitat, and can include a passive pupal stage.
Insects can breathe without using their lungs. Instead, the insect respiratory system employs a network of internal tubes and sacs through which gases are diffused or actively pumped, delivering oxygen to tissues in need via the trachea. Air is taken in by most insects through spiracles, which are small openings on the sides of the abdomen and thorax.
The respiratory system is a critical factor in limiting insect size. Because this type of oxygen transport becomes less efficient as insects grow larger, the heaviest insect currently weighs less than 100 g. Larger insects, such as dragonflies with wingspans of more than two feet, were possible with increased atmospheric oxygen levels, which were present in the late Paleozoic (60 cm).

Thus, we can say that insects do not have lungs.

Note:
Some submerged insect species have evolved adaptations to help them breathe. Many insects have gills that allow them to extract oxygen dissolved in water as larvae, while others must rise to the water's surface to replenish oxygen supplies, which may be held or trapped in special structures.