The deal on Human Hair

The deal on human hair:

Brunnette, Blonde, Redhead

  •  Humans are among the most hairless of all mammals.
  • The most important function of hair in mammals is that of insulating against cold by conserving body heat.
  • The differing colurs and color patterns in hair coats can also serve purposes of camouflage and of sexual recognition and attraction among the members of a species.
  • The average total number of hairs is between 100,000 and 150,000.
  • You are born with a fixed number of hair follicules (the wholes through where they grow out of), there is no way to add more, but some follicules can stop producing hair.

 

  • Typically
    • Red heads – 90,000 hair follicles
    • Black hair – 110,000 hair follicles
    • Blond hair – 130,000 hair follicles
  • As the cells are pushed upward from the follicle’s base, they become keratinized (hardened) and undergo pigmentation.
  • Eumelanin and Pheumelanin (two types of melanin) give pigmentation. Each hair has its own ratios; the more eumelanin the darker it is.
  • White hair is the lack of pigmentation. aAck of pigmentation comes with age and triggered with stress, or just melanin defficiencies.
  • Each human follicle follows this cycle independently of others, so the total amount of hair remains constant.

Random hair facts

  • Asian hair grows the fastest and has the greatest elasticity.
  • Human hair grows at a rate of about 0.5 inch (13 mm) per month. 12 to 15cm a year
  • The word shampoo comes from the Hindi ‘champna’, meaning to massage or knead.
  • Children lose an average of 90 hairs each day, which increases to 120 by old age.
  • Usually people will only notice that you are balding when you have lost almost 50% of the hair in your scalp.
  • Your hair’s strength is equilavent to a wire of iron.
  • Human hair mats were used as part of recent oil spill (November 2007) in the San Francisco Bay.
  • Human hair has different uses: wigs, gardening, to make art, or even to create a solar  pane (more on this)
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