What is the main role of stratum corneum in the skin layers?

The main role of the stratum corneum, the outermost layer of the skin, is to protect against external factors. This layer is composed of dead skin cells that have accumulated and hardened, forming a barrier that shields underlying tissues from environmental hazards such as bacteria, pollutants, and UV radiation. The structure of the stratum corneum is designed to prevent the penetration of harmful substances while also reducing water loss from the body.

By effectively serving as a protective shield, the stratum corneum plays a critical role in maintaining the skin's overall health and integrity. This protective function is essential for preventing infections and maintaining the skin's barrier, which is crucial for overall skin wellness.