The exoskeleton of arthropods is made of chitin, which is both strong and flexible.
The exoskeleton of arthropods is made of chiton which is a type of protein. Chitin provides protection and supports the attachment of muscles of arthropods. The exoskeleton does not grow accordingly to the growth of arthropods.
The exoskeleton contains thickened areas where chitin is deposited by materials such as hardened proteins. This usually happens when the body needs rigidity or elasticity. Calcium carbonate composed of mineral crystals is deposited among the chitinous exoskeleton.
Chitin is also associated with proteins, including a rubberlike substance called resilin which is elastic in nature. It is well flexible and strong.
The rigid shell composed of chitin of arthropods protects them from dehydration or desiccation. This particular function is necessary for terrestrial arthropods as they can perish if too much water is lost from body tissues. The chitinous exoskeleton also provides the best protection against some predators.
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