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32 Cards in this Set
- Front
- Back
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anagen |
period of growth in the hair cycle; averaging 3 to 5 years
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association |
a link between an unknown sample and known evidence |
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catagen
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intermediate period of hair growth; lasting about three weeks |
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cortex |
middle layer of the hair shaft that provides strength; comprises most of the hair mass |
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cortical fusi |
little sacs of air contained within the cortex; comes in different sizes and shapes |
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cuticle |
the clear outside covering of the hair shaft; made up of tough, overlapping scales |
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exemplar |
term used to describe a sample of known origin |
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follicle |
a tubelike organ in the sublayer of skin that hair grows from |
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keratin |
a tough protein polymer made of about 20 amino acids; accounts for distinctive smell of burning hair |
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medulla |
the spongy interior core of hair that gives it flexibility; appears as a canal |
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medullary index |
measure of the relative thickness; calculation: (diameter of medulla)/(diameter of hair) x100. |
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melanin |
a natural pigment found in skin; also, pigment granulates that give hair colour |
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polymer |
a molecule consisting of many identical repeating units; can be synthetic or natural |
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telogen |
final phase of hair growth; resulting in the loss of hair over three months |
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coronal (cuticle) |
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spinous (cuticle) |
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imbricate (cuticle) |
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undulation |
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twisted |
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fragmented (human) |
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interrupted (human) |
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continuous (human) |
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continuous (animal) |
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stacked (animal) |
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fabric |
a cloth material made up of fibers woven or bonded together in a distinctive manner |
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fibers |
made up of filaments bonded together to form a thread or yarn |
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filaments |
single strands of material, usually twisted with other filaments to make thread or fiber |
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inorganic |
substances not composed primarily of hydrocarbons |
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natural fibers |
animal, plant, or inorganic; wool, cotton, fiber glass, hemp, silk, cashmere, etc. |
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synthetic fibers |
synthesized or created from altered natural sources; rayon, nylon, acetate, polyester, spandex, acrylic, etc. |
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cellulose/plant based fibers |
fibers made with ether or esters of cellulose, which can be obtained from the bark, wood or leaves of plants, or from a plant-based material |
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protein/animal based fibers |
natural fibers that consist largely of particular proteins; silk, hair/fur (including wool) and feathers |
