What is the external skeleton of true insects called?

The external skeleton of true insects is referred to as an exoskeleton. This structure serves several critical functions for insects, including providing support and protection against environmental factors, as well as preventing water loss. The exoskeleton is made primarily of chitin, a tough and flexible polysaccharide that contributes to the overall rigidity and durability of the insect’s body.

Insects rely on this hardened exterior for both structural integrity and defense against predators. Additionally, during growth, insects undergo a molting process, where they shed their exoskeleton to allow for the expansion of their body size before forming a new, larger exoskeleton. Understanding the role of the exoskeleton is fundamental in entomology and pest control, as it plays a significant part in how insects interact with their environment and can influence their vulnerability to certain pest control methods.

The other options refer to different structures. An endoskeleton is found inside the body of organisms, like vertebrates, providing internal support. A shell typically refers to a protective outer layer in certain organisms, such as mollusks, rather than insects. A carapace is a specific type of exoskeleton, found in some arthropods and crustaceans, providing upper body protection, but