small but measurable amount of physical or biological material.

• Catagen

• Telogen

• Trace Evidence

consists of a root and a hair shaft which protrudes above the surface of the skin.

• Follicle

• Hair Shaft

• Postmortem

means “after death”

• Postmortem

• Keratin

• Anagen

innermost layer of the hair which form a shaft through the middle of hairs.

• Cortex

• Medulla

• Cuticle

middle layer and largest part of the hair shaft in humans

• Cortex

• Cuticle

• Anagen

transparent layer of the hair shaft which shields the inner layers

• Medulla

• Cortex

• Cuticle

crown-like scales pattern which are commonly found in hairs of small rodents and dogs.

• Coronal Pattern

• Spinous Pattern

• Imbricate Pattern

flattened-scale type which consist of overlapping narrow scales and are found in human hairs.

• Coronal Pattern

• Spinous Pattern

• Imbricate Pattern

threadlike elements from fabric or other materials, such as rope or carpet

• Fibers

• Litter

• Ligature marks

body area a hair comes from.

• Birefringence

• Cross Section

• Somatic Origin