What are sclerites?

Explanation

### Step-by-Step Solution:

1. **Definition of Sclerites**: Sclerites are chitinous plates that form part of the exoskeleton in certain arthropods, including cockroaches.

2. **Composition**: The primary component of sclerites is chitin, which is a long-chain polymer of N-acetylglucosamine, a derivative of glucose.

3. **Function**: Sclerites serve several important functions:
- They provide structural support and protection to the organism.
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