The deal on human hair:
- 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.
- 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)