Fingerprinting

fingerprinting

how old was the 1st fingerprint?

where was the 1st fingerprint?

what was the 1st fingerprint on?

6000 years old

china

clay pot

what were fingerprints used for before identification as we know it now

signiture

Marcello Malpighi background and fingerprinting relevance

Anatomy professor at the University of Bologna, Italy.

used a microscope to notice ridged skin increases friction between an object and skin surface

Johannes Purkinje

professor at the University of Breslau Germany

classified and named 9 groups of fingerprints

preclassification to the henry classification

Sir william hershel

British administrator, civil servant, and magistrate in India,

credited with being the first European to recognize fingerprints for identification purposes

credited with proving the persistance of friction ridge

galton

British anthropologist

certified that friction ridge skin is unique and persistent

gal detail are details for individualization

J.C.A Meyer

first to describe the repetitiveness and similarities of friction ridge patterns. first to write friction ridge skin as unique

alphonse bertillion

william and wayne case

using many measurements of the body to identify someone

sir edward henry

british civil servant. served in bengal india

created the henry classification system

how many layers does the epidermis have

5

how many layers does the dermis have

2

what cells make up the epidermis

keratinocytes, melanocytes, langerhans cells, and Merkel Cells

what percentage of epidermal cells are keratinocytes

90-95%

what is the purpose of keratinocytes?

to be filled with keratin that is a durable filament that extends throughout the cell and provide structural support

what are the purpose of melanocytes

pigment producing cells. key in its role as a protective barrier and synthesis of vitamin d

what is the primary cell of the epidermis?

keratinocytes

what are merkel cells

theyre an extension of the nervous system, associated with free nerve ending of the dermis. help with the sensation of touch

what are volar pads

transient swellings of mesenchymal tissue under the epidermis.

the placement of the volar pads affect what?

the fingerprint pattern type

what are the three main types of minutae

bifucation, ending ridge, dot

definition of a dot minutae

it is as long as it is wide

what is it called if a ridge is not fully formed

an insipient ridge

two things that aging does to fingerprints

wrinkles due to decreased elasticity and smudging of lines due to ridges flattening

what does displaysia do to fingerprints

doesnt let ridges form together