Fingerprints: Never Duplicated in Two Persons

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Unit 2

Finger prints
-no fingerprints have ever been the same.
-a fingerprint stay the same your whole life.
-general ridge patterns so they can't be systematically classified. Loops
-delta and cores
Ulnar loop
-opens toward the little finger
Radial loops
-opens toward the thumb
-one or more cores
-at least 2 delta
Plain whorl
-if you can draw a line in the middle of the two delta and makes both side symmetrically. Pocket loop
-not symmetrical
-rises slightly and exits on the opposite side (like a hump) -no delta or cores
Plain arch
-simple humps.
Tented arch
-looks like a tent (sharper angle)
3rd century B.C. In china=oldest known documents
Ancient Babylon (1792-1750 B.C.) fingerprints pressed into clay tablets marked contracts. 1684-Dr. Nehemiah's paper describes the patterns on human hands, including the presence of ridges. 1788-Johann Mayer noted that the arrangement of skin ridges is never duplicated in two persons. 1823-Jan Evangelist Purkyn describes nine fingerprint patterns 1856-Sir William Hershel began the collection of fingerprints and noted they were not altered by age. 1883-Alphonse Bertillon created a way to identify criminals that were repeat offenders. 1888-Sir Francis Galton and Sir Edmund Richard Henry developed the fingerprint classification system still used in the US 1891-Ivan Juan Vucetich collected all ten fingerprint impressions and noted measurements. 1896- Sir Henry and other colleagues created a system that divided fingerprints into groups. all ten fingerprints are imprinted on a card (called a ten card) along with other notations. ~All fingers, toes, feet, and palms are covered in small ridges. ~Ridges help us grip stuff

~Ridges are arranged in connected units called dermal, or friction, ridges. ~Fingers accumulate natural secretions and dirt.
~Finger leave and create prints on everything spew touch.

*skin consist of:
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