Hair Facts



  • Humans are one of very few land mammals to have almost bare skin. But even humans have soft, downy hair all over, with thicker hair in places.
  • Lanugo is the very fine hair babies are covered in when they are inside the womb, from the fourth month of pregnancy onwards.
  • Vellus hair is fine, downy hair that grows all over your body until you reach puberty.
  • Terminal hair is the coarser hair on your head, as well as the hair that grows on men’s chins and around an adult’s genitals.
  • The color of your hair depends on how much there are of pigments called melanin and carotene in the hairs.
  • Hair is red or auburn if it contains carotene.
  • Black, brown and blonde hair get its color from black melanin.
  • Each hair is rooted in a pit called the hair follicle. The hair is held in place by its club-shaped tip, the bulb.
  • Hair grows as cells fill with a material called keratin and die, and pile up inside the follicle.
  • The average person has 120,000 head hairs and each grows about 3 millimeters per week.