What is the outermost layer of the skin called?

The outermost layer of the skin is known as the epidermis. This layer serves as the first line of defense against environmental factors, including pathogens, chemicals, and physical abrasions. It plays a crucial role in protecting underlying tissues and maintaining the skin's hydration. The epidermis contains several sublayers, with the topmost being composed of dead skin cells that are continuously shed and replaced. This layer also houses melanocytes, which produce melanin, contributing to skin color and protection against UV radiation.

Understanding the structure and function of the epidermis is fundamental in fields related to health, skincare, and dermatology, as it is vital for overall skin health and plays an essential role in the body's barrier functions.