The illustration contains three parts:
  1. A labeled illustration of growth of hair in skin. The different parts labeled are:
    1. Hair bulb
    2. Hair follicle
    3. Dermis
    4. Epidermis
  2. A labeled illustration showing the growth of new hair in the skin. The growth of new hair pushing the old hair out of the follicle is indicated by an arrow mark at the top.
  3. A micrograph indicates individual hairs in the follicles.