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2015-11-19T20:09:15+08:00
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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