| A | B |
|---|
| keratin | protein from which hair and nails are made |
| cuticle | scaly outside of the hair shaft |
| imbricate | cuticle pattern for human hair |
| melanin | substance that gives hair its color |
| medullary index | width of medulla divided by the width of entire hair |
| gas chromatography | test that can be done on hair to detect toxins, heavy metals, or drugs |
| follicle | part of hair that contains nuclear DNA |
| shaft | part of hair that contains mitochondrial DNA |
| nuclear DNA | provides individual evidence to a specific person |
| mitochondrial DNA | provides class evidence for a family of people with the same mother or grandmother |
| medulla | center of a hair shaft |
| cortex | under the cuticle of the hair shaft and contains pigment |
| double medulla | seen in beard hair |
| hair with very flat cross sections | kinky or curly hair |
| hair with very round cross sections | very straight hair |
| dyed hair | stains the entire shaft |
| microns | unit to measure hair diameters |
| bleaching | oxidizes the natural pigment leaving a sharp demarcation |
| direct transfer | transfer of fibers directly to a victim or perpetrator |
| secondary transfer | Fibers picked up from one location to a victim or perpetrator, and then transferred again |
| natural fibers | biological fibers such as silk, cotton, wool, hemp, and asbestos |
| synthetic fibers | man made fibers such as polyester, nylon, rayon, olefin, acrylic |
| yarn | a strand made from short fibers that are wound together |
| rope | very thick yarn usually made of hemp, jute, or nylon |
| textile | fabric made from weaving yarns in cross patterns |
| polymers | long, repeating molecules that can be found in both natural and synthetic fibers |
| asbestos | a naturally occurring mineral used to make nonflammable building materials, but causes cancer |
| stem fibers | highly durable fibers of flax, hemp, jute, or linen |
| fruit fibers | coarse fibers of coir that are waterproof and very durable |
| seed fibers | primarily cotton fibers are this type, and very easily dyed and woven |
| cellulose | substance that makes up plant fibers |
| silk | natural, triangular fiber from the cocoon of a moth |
| hair fibers | natural animal hair that includes wool, alpaca, angora, llamas, and camels |
| wool or mohair | hair of sheep that smells of burning hair when burned |
