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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
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
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
List the 4 functions of hair. keep the body warm, decrease friction, protects skin from sunlight, is a sense organ
What is medullary index? the diameter of the medulla compared to the diameter of the entire hair
Who has a thicker medulla, animals or humans? animals have a thicker medulla
Created by: lb goodlock



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