What is the function of the layer of dead keratinocytes on the top of the epidermis?

Explanation:

1. Keratinocytes are maintained at various stages of differentiation in the epidermis.

2. Keratinocytes  are responsible for forming tight junctions with the nerves of the skin.

3. The outer layer of skin, the epidermis containing keratinocytes, which provides waterproofing and serves as a barrier to infection.  

4. It is barrier to foreign particles and provide physical strength.  

5. It helps in innate immune system.