Finger Prints

What are finger prints

friction ridges that allow for gripping objects 

where do finger prints form?

in the basal layer of the epidermis layer of skin

do identical twins have the same finger print

no

what are fingerprints influenced by

environment surrounding the fetus (Starts at 10 weeks)

Dactyloscopy

the study of fingerprint identification

how do you identify a loop

it has one or more ridges entering and exiting from the same side. must have one delta and one core.

what is a ulnar loop

opens towards the pinky

what is a radial loop

opens towards thumb

how do you identify an arch

no not have delta or core and ridges enter on one side and exit on the other

what are the two different groups of arches

Simple (plain) arch (barely arched)

tented arch (rly pointy)

how do you identify a whorl

have at least 1 ridge that makes a complete circle, and have at least 2 deltas

what are the 4 types of whorls

plain whorl

central pocket whorl

double loop whorl

accidental whorl

minutiae

characteristics of ridge patterns