Get to Know Your Hair Closely



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The hair is not only hairstyle, but there are many curious facts about its structure. The human hair consists of 50.65% carbon, 20.85% oxygen, 17.14% nitrogen, 6.36% hydrogen, 5.00% brimstone. Additionally, it contains minimum quantities of magnesium, arsenic, iron, chromium and other metals and minerals. The dark hair contains greater quantity of carbon than the blond hair.
– The hair grows with approximately 3-3.5 cm monthly, and at the age between 15 and 30 years it may grow even faster.
– The average life of a hair strand is between 4 and 7 years before it is replaced.
– Usually, between 75 and 150 hairs fall from the scalp every day.
– The number of hairs on the human head varies depending on the hair color. Red-haired have approximately 90 000, black-haired – 108 000, brown-haired – 140 000, and blond also have approximately 140 000.
– About 1000 hairs are located on 3 cm2.
– Hair-waving iron was created in 1875 by Marcel Grateau.
– Many hair dyes contain metal salts.

– The hair color scale (1 – black, 10 – light blond) was created with the aim to determine the appearance features of criminal suspects.
– Men have thicker hair than women.
– The thickness of a hair is 0.1 – 0.4 mm in diameter.
– Combing is more friendly than brushing.
– Hair grows faster when the weather is warm.
– A hair can bear 100 gr of weight. Theoretically, thus the hair should stand the weight of two elephants.
– The hair of Africans grows more slowly than hair of Europeans.
– The hair of Asians grows most rapidly and has the most elastic structure.
– At birth, a human has approximately 1000 follicles on square cm of their scalp, at 25 – about 600.
– It is not known why dandruff appears.
– Approximately 20 new hairs can grow successively from one follicle.
– If you pull a hair, a new one begins to grow from the same follicle.
– The hair is the fastest growing tissue in human body.

 



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