What is the primary function of keratin in the skin?

Keratin is a fibrous protein that plays a crucial role in the structure and function of the skin. Its primary function is to offer strength and water resistance. This protein forms a protective barrier on the epidermis, which is the outermost layer of the skin. By doing so, keratin helps to prevent water loss from the body and protects underlying tissues from environmental damage, such as pathogens and physical abrasions.

The presence of keratin contributes to the toughness and durability of the skin, ensuring it can withstand various mechanical stresses. Additionally, this water-resistant property is vital for maintaining hydration levels within the body, as it limits excessive evaporation of moisture from the skin surface.

Understanding the role of keratin highlights its importance in the overall health and functioning of the integumentary system, making it essential for protective and regulatory purposes.