What is the function of the stratum corneum?

The stratum corneum serves a vital role as the outermost layer of the epidermis. Its primary function is to provide a protective barrier against environmental damage. This layer is composed of dead keratinized cells that are tightly packed together, creating a formidable shield against pathogens, chemical irritants, and physical abrasions.

Additionally, the stratum corneum is essential in reducing water loss from the body, thus playing a crucial role in maintaining hydration levels of the skin. The unique structure of this layer allows it to be both durable and somewhat flexible, making it effective in protecting the deeper layers of the skin while still allowing the skin to maintain some level of elasticity.

Overall, its protective properties are critical for overall skin integrity and health, making it a key component of the body’s defense system against external threats.