13. Hair Follicle Cells: Growth Cycle
Hair follicle cells follow a distinct growth cycle consisting of phases: growth (anagen), rest (telogen), and shedding (catagen). This cycle ensures that hair is continually renewed, with each follicle operating on its own timetable.
Most scalp follicles remain in the growth phase for years, while others rest and eventually shed old hairs to make way for new growth. This dynamic cycle explains why we lose and regrow hair regularly. For more details, visit NCBI Bookshelf: Hair Growth Cycle.