The epidermis is for the most part impermeable to water. This water-impermeable skin is one of the features that allows us to live on land. Several cell types are present in the epidermis. This layer is made of flattened epithelial cells in multiple layers. These layers are called keratinized layers because of the build-up of the protein keratin in those cells.
Keratin is a strong protein that is specific to the skin, hair and nails .
The translucent or transitional layer. This is a translucent, thin layer of cells. The suprabasal layers. This is three to five layers of flattened polygonal cells that have granules in the cytoplasm. Below them is a layer of cube-shaped cells that also contain bundles of keratin filaments.