What are the functions of corniified layer or stratum corneum?

Explanation

### Step-by-Step Solution:

1. **Definition of Stratum Corneum**:
- The stratum corneum, also known as the cornified layer, is the outermost layer of the epidermis, which is a part of the skin.

2. **Composition**:
- It consists of 15 to 20 layers of flattened cells that lack nuclei and cell organelles. The primary protein found in these cells is keratin.

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