Fig. 1From: Impact of airborne particulate matter on skin: a systematic review from epidemiology to in vitro studiesSchematic overview of the human skin. (A) The skin consists of the epidermis and the dermis. (B) The epidermal layer consists, from top to bottom, of the stratum corneum (SC), the stratum lucidum (SL), the stratum granulosum (SG), the stratum spinosum (SS), and the stratum basale (SB). Figure adopted with permission from van Smeden et al. [22]Back to article page