| Nothing in life is as simple as it seems,
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| | cells. The hair's luster and sheen comes
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| so it should come as no surprise that the
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| | from the cuticle.How Hair GrowsScalp hair
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| strand of hair that you found on your
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| | grows at an average rate of six inches
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| brush this morning is an amazingly
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| | per year, or only .3-.4 mm per day. There
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| complex part of your body. Hair begins
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| | are three distinct stages of hair
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| appearing on the human body while it is
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| | growth.- Catagen PhaseThis transitional
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| still in the womb. By the time a
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| | phase runs about two to three weeks. At
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| developing fetus reaches 22 weeks old,
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| | any given time approximately 3% of your
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| there are already 5 million follicles on
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| | hair is in this phase. There is no hair
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| the body. Interestingly enough, that is
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| | growth during this period while the out
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| all of the follicles that will ever
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| | portion of the hair root sheath shrinks
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| develop regardless of how long we live.
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| | and attaches itself to the root.- Telogen
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| None will ever be added.Hair AnatomyHair
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| | PhaseThis phase, known as the "resting
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| consists of a follicle, which is embedded
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| | period" is experienced by approximately
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| in the skin, and the shaft of hair which
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| | 15% of your hair. Telogen lasts for
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| appears on our body. The follicle itself
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| | around 100 days for scalp hair and
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| consists of multiple layers with each
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| | significantly longer for other body
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| layer having a specific function. The
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| | hair.- Anagen PhaseThis phase defines a
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| papilla lies at the base of the follicle.
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| | period of activity where the hair cells
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| Capillaries are connected to the papilla
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| | are dividing and new hair growth occurs.
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| and they supply blood to the cells which
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| | This phase can last for as long as two to
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| surround the bottom part of the hair
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| | six years. Shorter growth periods are
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| strand called the bulb.Surrounding the
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| | indicative of people who have trouble
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| follicle are two sheaths, inner and
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| | growing their hair long.Hair Growth
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| outer, which are designed to both protect
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| | DisordersThere are two hair growth
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| the hair shaft from damage, and to help
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| | disorders that affect humans. Hirsutism
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| it grow out in the proper direction. The
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| | is a condition affecting mostly females.
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| inner sheath runs next to the hair shaft
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| | It is defined as a condition where
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| and ends at the oil (sebaceous) gland.
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| | excessive thick and dark hair growth is
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| The outer sheath runs to the gland and
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| | experienced in areas typically reserved
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| ends at the erector pili muscle. This is
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| | for males. These areas include the face,
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| the muscle that causes our hair to "stand
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| | chest and the areolae or area surrounding
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| on end" when it contracts.The hair shaft
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| | the nipple. Hypertrichosis is a condition
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| is comprised of three layers of dead
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| | which causes excessive hair growth in
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| protein cells called keratin. The
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| | areas of the body where visible hair is
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| innermost layer, known as the medulla, is
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| | not normally present. Both of these
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| not always present in every hair shaft.
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| | conditions are treatable.Andrea Strachan
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| The second layer, known as the cortex,
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| | has been in the beauty business for 25
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| provides the bulk of the hair shaft. The
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| | Years. For more information about hair
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| hair color is mostly determined by the
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| | growth and hair biology visit For info
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| pigmentation contained in this layer. The
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| | about the latest Sedu hair styles click
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| outermost layer is called the cuticle. It
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| | here.
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| is comprised of a series of overlapping
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