Forensics: Hair

Front 1

Anagen Phase

Back 1

The initial growth phase during which the hair follicle actively produces hair

Front 2

Catagen Phase

Back 2

A transition stage between the Anagen and Telogen phases of hair growth

Front 3

Coronal

Back 3

Crown-Like; found in hairs of very fine diameter and resembles a stack of paper cups (found in small rodents & bats)

Front 4

Cortex

Back 4

The main body of the hair shaft; Contains the pigment granules that impart color to hair

Front 5

Cortical Fusi

Back 5

Little sacs of air

Front 6

Cuticle

Back 6

The scale structure covering the exterior of the hair

Front 7

Eumelanin

Back 7

Responsible for black and brown color

Front 8

Follicular Tag

Back 8

A translucent piece of tissue surrounding the hair’s shaft near the root. It contains the richest source of DNA associated with hair

Front 9

Hair Follicle

Back 9

Hair is an appendage of the skin, growing out of an organ

Front 10

Imbricate

Back 10

Flattened scale type of overlapping scales with narrow margin- commonly found in human hairs but many animal hairs

Front 11

Keratin

Back 11

Tough protein polymer made up of about 20 different amino acids

Front 12

Keratinized

Back 12

The scales form from specialized cells that have hardened and flattened in progressing from the follicle

Front 13

Medulla

Back 13

The central canal running through many hairs

Front 14

Medullary Index

Back 14

Measures the diameter of the medulla relative to the diameter of the hair shaft and is normally expressed as a fraction

Front 15

Melanin

Back 15

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.

Front 16

Metabolites

Back 16

idk

Front 17

Mitochondrial DNA

Back 17

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)

Front 18

Nuclear DNA

Back 18

DNA present within the nucleus of a cell. This form of DNA is inherited from both parents

Front 19

Phaeomelanin

Back 19

Responsible for red shades

Front 20

Polymers

Back 20

A substance composed of a large number of atoms. These atoms are usually arranged in repeating units or monomers

Front 21

Root

Back 21

grows at about 1cm per month; three stages (Anagen, Catagen, & Telogen)

Front 22

Spinous

Back 22

Petal-Like scales are triangular in shape & protrude from hair—fur hairs of seals & bats

Front 23

Telogen Phase

Back 23

The final growth phase in which hair naturally falls out of the skin

Front 24

Undulation

Back 24

One of a series of wavelike bends, curves, or elevations