hair growth, about hair, hair cycle

Download Hair growth, About Hair, Hair Cycle

Post on 14-Apr-2017

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HOW HAIR GROWS ?

HOW HAIR GROWS ?

1. What is Hair ?

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The definiton of hair1Hair is a protein filament that grows from follicles found in the dermis, or skin. Hair is one of the defining characteristics of mammals. The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair. Hair is also an important biomaterial primarily composed of protein, notably keratin.

The StructureOF HAIR4

Hair grows out of little pockets in your skin, called follicles. Here's how it happens :5

Hair follows a specific growth cycle with three distinct and concurrent phases6AnagenCatagenTelogen

AnagenYour hair begins growing from a root in the bottom of the follicle. The root is made up of cells of protein.Blood from the blood vessels in your scalp feeds the root, which creates more cells and makes the hair grow.7

CatagenThe hair gets pushed up through the skin as it grows, passing an oil gland along the way. The oil gland adds oil to the hair and keeps it shiny and soft. 8

Telogen9The hair dies by the time it is long enough to poke out through the skin.

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