What is the outer layer of skin called?

The correct response is the epidermis, which is the outermost layer of the skin. It serves as a protective barrier, shielding the underlying tissues from environmental hazards such as pathogens, chemicals, and physical abrasions. The epidermis is primarily composed of keratinocytes, which produce keratin, a protein that helps waterproof the skin and protect it from dehydration.

Additionally, the epidermis contains melanocytes, which produce melanin, the pigment that gives skin its color and offers some protection against UV radiation. This layer does not contain blood vessels; instead, it receives nutrients through diffusion from the underlying dermis. Understanding the structure and function of each skin layer, including the epidermis, is essential for a combat medic, as it can guide wound care and treatment protocols for skin injuries.