What is the function of keratin in the epidermis?

Explanation

### Step-by-Step Solution:

1. **Understanding Keratin**:
- Keratin is an insoluble protein found in various structures of animals, including the epidermis (the outer layer of skin) and hair.

2. **Location of Keratin**:
- In the context of the epidermis, keratin is present in keratinized cells, which are located in the outermost layer of the skin.

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