forensics vocab unit 5

Comparison microscope

A microscope that lets you see two samples side by side

Hair shaft

The visible part of the hair above the skin

Cortex

The middle layer of the hair that gives it color and strength

Keratin

A tough protein that makes up hair and nails

Melanin granules

Tiny particles in the cortex that gives hair its color

Cuticle

The outer layer of hair made of overlapping scales

Medulla

The center core or inner layer of the hair Strand

Medullary index

Ratio of the medullas width to the whole hairs width

Hair follicle

The pocket in the skin where the hair grows

Follicular tag

Tissue from the root of the hair that can have dna

Epidermis

The outermost layer of skin

Dermis

The thicker layer of skin beneath the epidermis

Anagen

There growing stage of hair

Catagen

The short transition stage when growth stops

Telogen

The resting stage when hair can fall out

Nuclear dna

DNA found in the cells nucleus; unique to each person

Mitochondrial dna

DNA found in cell mitochondria; passed Down from mother

Morphology

The study of shape, structure and form