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Hair and fibers
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Question | Answer |
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What is trace evidence? | Any very small physical material that can be transferred from person to person or between a person and a crime scene. |
What are the hair's anatomy? | The cortex, cuticle and medulla. |
What is the cortex? | Largest portion of the shaft. |
What is the cuticle? | The layer of cells that cover the surface of the shaft. |
What is the medulla? | The cell that runs down the center of the cortex. |
What are the three basic types of the cuticle? | Coronal(crown-rat), Spinous(petal-cat), and imbricate(flattened-humans). |
What is the differnece between a human's medullary index and an animal's? | The human's is 0.3 in width and the animal's is greater than 0.5. |
What is the study of hair? | Trichology. |
What provides the most features for comparison to other hairs and explain why? | Scalp hair, because it has the most characteristics. |
4 classifications of fiber? | Mineral(glass),Animal(silk), Vegetable(cotton), and synthetic(nylon). |
What are the tests? | Burn(beading), Solvent/Solubility( bleach), Stain(will blood stain the cloth),Microscopic test(braids). |
What are the two collection methods? | The tape method and sweeping/vacuming method. |
where can you find hair? | List. |