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Parts of the hair
Hair developement
Hair evidence
Miscellaneous
Miscellaneous
100
Hair consists of two parts what are the two parts called
the follicle and the shaft
100
How many stages of growth does hair go through
3
100
Hair is considered what type of evidence
class evidence
100
The cuticle of human hair is described as __________
imbricate
100
What is one of the 4 main functions of hair
Regulates body temperature protects against sunlight reduces friction acts as a sense organ
200
What are the three layers of the hair shaft in order from outermost to innermost
Cuticle - outer layer cortex - middle layer medulla - inner layer
200
what is the stage of development called when hair is actively growing
anagen
200
what part of the hair contains the DNA
the follicle
200
The central core of the hair is called the _____
Medulla
200
Name 3 difference between human and animal hair
medullary index pigmentation cuticle scales
300
The transparent outer layer of the hair shaft is called the
Cuticle
300
During what stage does hair stop growing and starts changing
catagen
300
Whenever two objects are in contact some transfer of material will occur this is known as
Locard's exchange principle
300
a type of protein made up of a chain of amino acids that makes hair both strong and flexible is:
Keratin
300
trace amounts of drugs remain in the hair for roughly how many days
90 days
400
The region of a hair located outside of the medulla containing granules of pigment is called
Cortex
400
During what stage is hair dormant and easily lost
Telogen
400
Name three things forensic investigators will look for under the microscope when examining hair
Pattern of the medulla pigmentation in the cortex scale pattern of the cuticle
400
how many hairs is a human baby born with
5 million
400
Name the six types of hair on the human body
head hair facial hair armpit hair pubic hair auxiliary hair (body hair) eyelashes
500
In Humans what is the largest part of the hair shaft
Cortex
500
How many days is hair in the anagen stage for
1000 days
500
Hair can adhere to clothes, carpets and many other surfaces and be transferred to other locations. This is called
Secondary transfer
500
Bits of pigment found in the cortex of a hair is called
melanin granule
500
how do you calculate the medullary index of hair
width of the cortex divided by the width of the medulla