The outer layer of skin is called the epidermis. It acts as a protective barrier for the body, shielding underlying tissues from environmental damage, pathogens, and dehydration. The epidermis is composed of several layers, with the outermost being made up of dead skin cells that are continually shed and replaced. The epidermis also contains melanocytes, which produce melanin, the pigment responsible for skin color. Overall, the health of the epidermis is crucial for protecting the body and maintaining hydration, temperature regulation, and sensory perception.