Forensic Science Hair Evidence Review

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Cortex

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The region of hair located outside of the medulla containing granules of pigments.

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Main purpose of hair

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Regulate body temperature.

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Class characteristics

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When evidence can only be associated with a group and never with a single source.

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Scale pattern identifying human hair

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Imbricate.

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Comparison microscope

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A compound microscope that allows the side by side comparison of the samples, such as of hair or fibers.

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Medulla

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The central core of a hair fiber.

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Cuticle

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The tough outer covering of a hair composed of overlapping scales.

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Hair growth phases

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Anagen, Catagen, and Telogen.

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Hair as evidence

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Can provide information about the origin, age, and condition of the individual.

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Microscopy in forensic science

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Used to analyze hair and fibers for comparison.