What is the primary structural feature of hair cells located in the cortex?

The primary structural feature of hair cells located in the cortex is that they are elongated. Hair cells, specifically in the context of the hair's structure, refer to the keratinized cells that make up the hair shaft. These cells are arranged in a way that allows for strength and organization, which is crucial for the structural integrity of hair.

Elongation plays a significant role in how hair is formed and how it interacts with the environment. The elongated shape allows for better alignment and organization within the follicle, contributing to the overall texture and appearance of the hair. This elongation supports the hair's function and resilience, as it can withstand various physical stresses, such as pulling and tension.

In contrast, spherical, flat, or cubical shapes do not accurately represent the structure of hair cells in the cortex. These shapes are more typical of cells with different functions or located in different tissues, lacking the necessary characteristics that define hair cells. The elongated form is specifically adapted to fulfill the unique requirements dictated by hair's role in protection and aesthetics.