Final answer:
The outermost layer of the skin is the epidermis, specifically the stratum corneum.
Step-by-step explanation:
The outermost layer of the skin is the epidermis. It is the top layer of the skin and serves as a protective barrier against external factors such as bacteria, UV radiation, and dehydration. The epidermis is composed of several layers, with the stratum corneum being the topmost layer.