The arthropod cuticle has been in existence for well over 500 million years. The cuticle is mostly composed of two types of polymers, proteins and chitin. Chitin is a polysaccharide that provides structural support for the cuticle. Chitin is the second most abundant natural polymer on planet earth, after cellulose (produced by plants).
Chitin is also a waste product from the seafood industry. The muscular tissues of shrimp and other shellfish are consumed by humans but the cuticle is…
Source: Living With Insects Blog