What is the cortex in hair structure responsible for?

The cortex in hair structure plays a crucial role in providing strength and color to the hair. Composed primarily of long chains of keratin proteins, the cortex contains melanin, which is the pigment responsible for the natural color of hair. This inner structure is significant for the overall durability and resilience of the hair strand, making it integral to the hair's ability to withstand various environmental factors and styling practices.

In contrast to this, the outer layer of the hair, known as the cuticle, serves a protective function. While the outer layer ensures that the hair shaft is safeguarded against physical damage and environmental elements, it is the cortex that is fundamentally responsible for the hair's strength and pigmentation. Additionally, moisture regulation relates more to the hair's cuticle and the overall health of the hair rather than being a function of the cortex. Therefore, the primary responsibility of the cortex lies in enhancing both the strength and the natural color of the hair.