The stratum corneum is the skin’s barrier and is the top layer of the epidermis. In the epidermis, keratinocyte stem cells reside in the basal layer, which is the lowest layer of the stratified epithelia. These cells divide further and differentiate as they move upwards in the epidermis towards the stratum corneum. Found within the stratum corneum are corneocytes which are dead keratin-filled squamous cells…