What Are Three Functions of an Arthropod Exoskeleton?

Three functions of an arthropod's exoskeleton are protection, support and muscle attachment. The exoskeleton starts as procuticle, made up of layers that include chitin microfibers in a protein matrix. After each molt, parts of the procuticle harden, forming the familiar exoskeleton of a beetle, centipede or lobster.

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