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| The scientific study of hair, and its diseases and care |
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| tube-like depression or pockets in the skin or scalp that contains the hair root |
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| the lowest area or part of a hair starnd |
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| a small, cone-shaped area located at the base of a hair follicle that fits into the hair bulb |
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| tiny, involuntary muscle in the base of the hair follicle (goose bumps) |
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| Oil glands of the skin, connected to hair follicle |
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| 3 main layers of the hair shaft |
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| outermost transparent layer of the hair, hairs primary defense against damage |
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| newly formed cells mature, they fill up with a fibrous protein called keratin, then move upward, lose their nucleus, and die |
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| chemical bond that links amino acids |
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| a long chain of amino acids linked by peptide bonds |
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| weak, temporary side bond between adjacent polypeptide chains, easily broken by strong alkaline or acidic solutions. Account for about 1/3 of hairs overall strength |
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| Natural hair color, or tiny grains of pigmentlocated within the cortex |
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| melamin that provides brown and black color to hair |
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| melanin that provides color ranging from reds to blondes |
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| the shape of the hair, described as straight, wavy curly or extremly curly |
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| thickness or diameter of individual hair strand, classified as coarse, medium or fine |
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| # of individual hair starnds on 1 square inch of the scalp |
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| ability of the hair to absorb moisture |
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| ability of the hair to stretch and return to its original length without breaking |
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| hair that forms in a circular pattern, normally forms in the crown |
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| short, fine downy hair that is not pigmented and almost never has a medulla |
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| long hair found on the scalp, legs, arms and bodies of males and females, usually has a medulla, dark color and coarse in texture |
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| sudden falling out of the hair in round patches or baldness in spots, may occur on the scalp and elsewhere on the body |
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| the only two products proven by the FDA to stimulate hair growth |
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Definition
| topical medication applied to the scalp twice a day, proven hair growth stimulator |
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Definition
| oral prescription hair growth stimulator for MEN ONLY! |
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| technical term for gray hair |
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| parasite called the itch mite that burrows under the skin |
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| infestation of the hair and scalp with head lice |
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Definition
| acute, localized bacterial infection of the hair follicle that produces constant pain |
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Definition
| an inflammation of the subcutaneous tissue caused by staphlococci, similiar to furuncle but larger |
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