Which type of skeleton is commonly found in insects?

Insects possess an exoskeleton, which is a rigid outer structure that provides support and protection. This exoskeleton is primarily made of chitin, a polysaccharide that is both strong and lightweight, allowing insects to maintain their shape and defend against environmental hazards and predators. The exoskeleton also plays a critical role in water retention, which is particularly important for terrestrial insects to prevent desiccation.

By contrast, an endoskeleton, typically found in vertebrates, is located inside the body and is composed of bones or cartilage. Hydrostatic skeletons, which are maintained by fluid pressure, are seen in organisms like worms and jellyfish, while cartilaginous skeletons are characteristic of certain fish, such as sharks and rays. Thus, the exoskeleton is indeed the correct structure for insects, as it fulfills multiple functions essential to their survival and adaptation in various environments.