<prompt> Cells as they approach towards stratum corneum shows the following featuresCells become flat and dehydratedNucleus lostLoss of mitotic and metabolic activityAll of the above  <response>: Stratum corneum It is the outer most layer, which serves as a mechanical barrier between the epidermis and the environment. It is Composed primarily of protein-rich corneocytes bricks; contain NO nuclei; keratin filaments attached to cornified envelope embedded in a lipid matrix moar, cornified lipid envelope. It Serves as a barrier to water loss conditions that peurb the skin transepidermal water loss and toxinsinfectious agents. Ref:- Review of Dermatology by Alikhan; pg num:-5 