The insect outer skeleton, the cuticle, is made up of two layers: the epicuticle, which is a thin and waxy water resistant outer layer and contains no chitin, and a lower layer called the procuticle. The procuticle is chitinous and much thicker than the epicuticle and has two layers: an outer layer known as the exocuticle and an inner layer known as the endocuticle. The tough and flexible endocuticle is built from numerous layers of fibrous chitin and proteins, criss-crossing each other in a sandwich pattern, while the exocuticle is rigid and hardened.:22–24 The exocuticle is greatly reduced in many soft-bodied insects (e.g., caterpillars), especially during their larval stages. COUNT 5
QSN1 Insect's outer skeleton is known as what? ANS1 the cuticle QSN2 The cuticle has how many layers? ANS2 two QSN3 Which cuticle later is like wax? ANS3 the epicuticle QSN4 The epicuticle does not consist of what? ANS4 chitin QSN5 Is the procuticle thinner or thicker than the epicuticle? ANS5 thicker