Hair Structure
Head hair grows approximately 0.44 mm per day. The length of hair would be ____ mm after 30 days of growth.
What is 13.2 mm (1.32 cm) (also 0.5 in)
Ethnicity from which kinky/curly, densely distributed pigment, and a cross-section that is flattened with moderate to small diameter is common
What is African ethnicity
Bits of pigment found in the cortex of hair
What are melanin granules
When hair can be considered circumstantial, biological, individual evidence.
What is contains the follicle
The youngest cells of the hair are near this
What is the hair follicle or root
Determining that a hair is of European (Caucasian) ethnicity is a determination of
What is the class of evidence
Hair source with only imbricate scales
What is human hair
Hair growth slows and stops
What is Catagen Stage
Determined by measuring the diameter of the medulla and dividing it by the diameter of the hair. Animal is 1/2 or greater. Human is 1/3 or smaller.
What is the Medullary Index
Small but measurable amounts of physical or biological material found at a crime scene
What is trace evidence
You lose approximately _____ to _____ hairs a day
What is 40 to 125
You can determine if someone is taking these from the chemical analysis (toxicology) of hair
What are drugs
Head hair grows about...
What is 0.44 mm per day (0.5 cm per month)