Hair
A network of blood vessels that supply nutrients to feed the hair and help it grow
Papila
Microscope that uses light to indicate the presence of dyes
Fluorescence
How often does a full head of hair get replaced?
Every third year
The average hair grows how much per month?
In many mammals, hair can be very dense, and it is then referred to as
Fur
Muscles that cause hair to stand upright
Erector
Microscope that views side by side images of hair samples
Comparison
While getting dressed, you dropped your shirt on the floor and picked up dog hair. When you arrived at school and sat in your desk chair, you transferred some of that dog hair to the chair. This is an example of what?
Secondary transfer
Human hair has which type of cuticle?
imbricate
Pigment which gives color to brown and black hair is called
Eumelanin
The layer of hair that contains pigment granules
Cortex
Microscope that provides incredible details of the surface or
What is the main purpose of hair?
Regulate body temperature
Rodent and bat hair has which type of cuticle?
coronal
Pigment which gives color to blonde and red hair is called
pheomelanin
Transparent outer layer of the hair
Cuticle
Technique that can identify up to 14 different elements in a single strand of human hair
Neutron Activation Analysis
The hair shaft is composed of what important protein?
Keratin
Hair without the root is considered what type of evidence?
class
When hairs found at a crime scene look very different from hairs collected from a suspect, this is called:
Exclusion
The central core of the hair
Medulla
What is the first step in testing the hair shaft for substances such as drugs?
Dissolving the hair
When collecting hairs from a suspect to compare to those found at a crime scene, how many control hairs should be collected?
50 from head; 25 from pubic region
What are the two main parts of a hair?
follicle and shaft
How long does it take for newly cut hairs to take on an uncut, rounded shape?
2-3 week