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A fingerprint consists of one or more connected ridge units of friction ridge skin. There are three basic patterns of fingerprints: whorl, loop, and arch. Some people have one pattern, others two, and others all three patterns. – WTF Fun Facts
Source: Say What?! Fingerprints, A Crazy Concept – Allbodies
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source https://earn8online.com/index.php/256969/wtf-fun-fact-friction-ridge-skin/
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