epidermis

The term 'epidermis' refers to the outermost layer of skin in humans and many other animals. It serves as a protective barrier, safeguarding the underlying tissues from environmental hazards such as pathogens, ultraviolet radiation, and chemical irritants. The epidermis is composed mainly of keratinocytes, which produce keratin, a protein that contributes to this protective function. Additionally, it plays a crucial role in regulating moisture and temperature while facilitating sensory perception.