chitinous exoskeleton and arthropods

A chitinous exoskeleton refers to a tough, outer protective covering made of chitin, a complex sugar-like substance, that encloses and supports the bodies of certain organisms. Arthropods, such as insects, spiders, and crustaceans, have a chitinous exoskeleton. They are a large and diverse group of invertebrate animals characterized by jointed appendages, segmented bodies, and a hard outer covering that provides protection and support.

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