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FS - Hair review

hair review

List 3 ways to collect hair from a crime scene. (1) picking up each shaft with tweezers, (2) lifting with tape or lint roller, (3) collecting with a vacuum
Name the three layers of a shaft of hair. cuticle, cortex, medulla
List the 3 cuticle patterns. Coronal, spinous, imbricate
Which layer is on the outside of the hair? Cuticle
Which layer is in the center of the hair? Medulla
List the 4 medulla patterns. continuous, fragmented, interrupted, absent
The scales on the cuticle overlap in which direction? toward the tip
How many hairs are found on the human scalp? 100, 000 to 150, 000
Which medulla pattern is one solid line in the hair? continuous
Which medulla pattern is broken into sections of equal or almost equal lengths? interrupted
Which medulla pattern is not present at all? absent
Which medulla pattern is broken into sections of different lengths? fragmented
The term trace evidence means any small pieces of evidence, for example: blood spatter, fingerprints, bullet holes, hair, fibers
Which term describes the part of the skin where the hair grows? follicle
Which term describes the part of hair growing under the skin? root
fibers found in nature natural fibers
fibers that are made by humans, usually from petroleum manufactured or synthetic fibers
the two types of natural fibers plant and animal
Created by: lb goodlock