Final answer:
The most superficial layer of the skin is the stratum corneum, which is the outermost layer of the epidermis and consists of dead keratinized cells that serve protective functions.
Step-by-step explanation:
The most superficial layer of the skin is the stratum corneum, which is the outermost layer of the epidermis. The stratum corneum is responsible for protecting underlying tissues against environmental threats and preventing dehydration.
Because it consists of dead keratinized cells, microdermabrasion and other cosmetic procedures often target this layer to remove the dry, upper layer and maintain healthy-looking skin. The epidermis is the outer layer of the skin, and the dermis is the inner layer where most skin structures originate.