olemus
reljeefselt eenduv nahaosa
sõrmede, varvaste, peopesa, talla pinnal

ISO/IEC 19794:
sõrme, varba, peopesa, talla nahakurd,
mis normaalsel puudutusel
puutub kokku mingi juhupinnaga;
sõrmedel moodustavad papillaarkurdude
kordumatud mustrid sõrmejälje

ülevaateid
http://slideplayer.com/slide/4736812/15/images/7/WHAT+ARE+FRICTION+RIDGES.jpg

https://duckduckgo.com/?q=friction+ridges&t=h_&iax=images&ia=images
http://slideplayer.com/slide/4736812/15/images/7/WHAT+ARE+FRICTION+RIDGES.jpg

https://www.sqaacademy.org.uk/pluginfile.php/33932/mod_resource/content/1/F823%2011%20FINAL%20from%20email%20link%206%20Mar%2012/Fingerprints/analysis.html

https://image.slidesharecdn.com/uniquenessandpermanenceoffrictionridge-100423092144-phpapp02/95/uniqueness-and-permanence-of-friction-ridge-10-728.jpg

vt ka
- papillaarpildindus