Learn About Our Hair

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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.

Types

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 colour 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
their colour from black melanin.

Chemical and Physical Behavior of Human Hair

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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 Human Hair Anatomical Chart

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The average person has 120,000 head hairs and each grows about 3mm per week.
Hair in poor condition is said to be lifeless.
In fact, all hair is lifeless since it is made of
keratin, the material left by dead cells.
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