This prevents the new procuticle from getting digested as it is laid down.
2.
That outer layer is the " epicuticle ", and it is much thinner than the procuticle.
3.
The chitinous procuticle consists of two major layers, the outer " exocuticle " and the inner " endocuticle ".
4.
The procuticle in most land Arthropoda, particularly insects, is covered externally with a thin, waxy, water-resistant outer layer containing no chitin.
5.
The insect outer skeleton, the cuticle, is made up of two layers; the epicuticle, which is a thin, waxy, water-resistant outer layer and contains no chitin, and the layer under it called the procuticle.
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