Chitin is a reinforcing fiber in the external skeleton of arthropods.

Name: Chitin is a reinforcing fiber in the external skeleton of arthropods.
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Chitin is a long-chain polymer of a glucose derivative, which is a primary component of the cell walls of fungi, the exoskeletons of arthropods, such as crustaceans (e.g., crabs, lobsters, and shrimps) and insects, and the scales of fish and amphibians. It serves as a reinforcing fiber that gives structural support and protection.

Chitin Is a Reinforcing Fiber in the External Skeleton of Arthropods