<Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> The epidermis is the outer layer of the two layers that make up the skin, the inner layer being the dermis . The epidermis layer provides a barrier to infection from environmental pathogens and regulates the amount of water released from the body into the atmosphere through transepidermal water loss . </P> <P> The outermost part of the epidermis is composed of stratified layers of flattened cells, that overlies a basal layer (stratum basale) composed of columnar cells arranged perpendicularly . </P> <P> The rows of cells develop from the stem cells in the basal layer . ENaCs are found to be expressed in all layers of the epidermis . </P>

What are the four cells that make up the epidermis