Hair Analysis 2: Basic Information Flashcards
Hair consists of a __ produced by a ___ embedded in the skin.
Hair shaft, Follicle
The cuticle is the outermost layer that…
- is made of overlapping scales
- protects inner layers
- is used to ID species
The thickest layer of skin is the ____. It gives hair….
Cortex
-gives hair it’s color
Hair on mammals regulates_____
Body temperature
The _____of hair can be circular, triangular, irregular, or flattened influencing the curl of the hair.
Cross-section
The five medulla patterns are…
- continuous
- intermittent/ interrupted
- fragmented/ segmented
- solid
- none
Only race known to have continuous medulla
Mongoloid (Asian)
Anagen Stage
Hair actively grows
Catagen Stage
Hair grows and changes
Telogen Stage
Hairs easily lost; follicles dormant
In animals, the medulla is much thicker than in humans. This represents the difference in the _____.
Medullary Index
Cuticle patterns:
- Spinous ((resembles petals))
- Coronal ((resembles stack of crowns))
- Imbricare ((found in humans; often flattened and narrow))
Macroscopic investigation….
Examines color, length, curliness
Microscopic Investigation….
Indicates fine detail of hair structure
_____microscopy can show the presence of dye/ other treatments
Phase-Contrast
