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24 Cards in this Set
- Front
- Back
Anagen Phase
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The initial growth phase during which the hair follicle actively produces hair
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Catagen Phase
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A transition stage between the Anagen and Telogen phases of hair growth
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Coronal
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Crown-Like; found in hairs of very fine diameter and resembles a stack of paper cups (found in small rodents & bats)
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Cortex
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The main body of the hair shaft; Contains the pigment granules that impart color to hair
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Cortical Fusi
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Little sacs of air
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Cuticle
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The scale structure covering the exterior of the hair
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Eumelanin
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Responsible for black and brown color
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Follicular Tag
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A translucent piece of tissue surrounding the hair’s shaft near the root. It contains the richest source of DNA associated with hair
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Hair Follicle
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Hair is an appendage of the skin, growing out of an organ
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Imbricate
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Flattened scale type of overlapping scales with narrow margin- commonly found in human hairs but many animal hairs
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Keratin
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Tough protein polymer made up of about 20 different amino acids
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Keratinized
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The scales form from specialized cells that have hardened and flattened in progressing from the follicle
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Medulla
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The central canal running through many hairs
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Medullary Index
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Measures the diameter of the medulla relative to the diameter of the hair shaft and is normally expressed as a fraction
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Melanin
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any of a class of insoluble pigments, found in all forms of animal life, that account for the dark color of skin, hair, fur, scales, feathers, etc.
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Metabolites
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idk
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Mitochondrial DNA
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DNA present in small structures (mitochondria) outside the nucleus of a cell. Mitochondria supply energy to the cell. This form of DNA is inherited maternally (from the mother)
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Nuclear DNA
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DNA present within the nucleus of a cell. This form of DNA is inherited from both parents
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Phaeomelanin
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Responsible for red shades
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Polymers
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A substance composed of a large number of atoms. These atoms are usually arranged in repeating units or monomers
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Root
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grows at about 1cm per month; three stages (Anagen, Catagen, & Telogen)
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Spinous
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Petal-Like scales are triangular in shape & protrude from hair—fur hairs of seals & bats
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Telogen Phase
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The final growth phase in which hair naturally falls out of the skin
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Undulation
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One of a series of wavelike bends, curves, or elevations
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