The shape of the hair strand is determined by the shape of which structure?

• A. Hair Shaft
• B. Hair Follicle
• C. Papilla
• D. Cortex

Answer: (B)

Hair shape is set by the follicle’s geometry. As the hair grows from the follicle, the follicle’s curve, angle, and overall orientation mold how the keratinized cells are laid down and emerge as the strand. A straight follicle tends to produce a straight strand, while a curved or angled follicle imparts a curl or wave. The papilla at the base mainly provides nourishment, and the cortex is part of the hair shaft that contributes to strength and texture once the strand is formed, but the curl pattern is established by the follicle’s shape.