Judged: two independent readers; copy check clear.
hair follicle
hair follicle A hair follicle is a skin structure involved in maintaining skin function and in thermal regulation, social communication, and sensing.
A hair follicle is a skin structure involved in maintaining skin function and in thermal regulation, social communication, and sensing. It forms through coordinated signaling between skin layers and cycles through growth, regression, and resting stages over the lifespan.