What is the main function of chitin in arthropods?

The primary function of chitin in arthropods is to provide structural support. Chitin is a tough, flexible polysaccharide that forms the exoskeleton of these organisms, contributing to their overall shape, protection, and defense against environmental factors. This exoskeleton not only supports the body but also helps prevent water loss, making it essential for survival in various habitats. Chitin's structural role is vital for maintaining the integrity of the arthropod's body, allowing it to withstand physical stress and provide a point of attachment for muscles, which is crucial for movement. This function distinguishes chitin from other biological materials involved in energy storage, detoxification, or reproductive processes, which do not specifically relate to the physical support and protection of the organism's body structure.