Fingerprint

A fingerprint in its narrow sense is an impression left by the friction ridges of a human finger. In a wider use of the term, fingerprints are the traces of an impression from the friction ridges of any part of a human or other primate hand. A print from the foot can also leave an impression of friction ridges. A friction ridge is a raised portion of the epidermis on the digits (fingers and toes), the palm of the hand or the sole of the foot, consisting of one or more connected ridge units of friction ridge skin. These are sometimes known as "epidermal ridges" which are caused by the underlying interface between the dermal papillae of the dermis and the interpapillary (rete) pegs of the epidermis. These epidermal ridges serve to amplify vibrations triggered, for example, when fingertips brush across an uneven surface, better transmitting the signals to sensory nerves involved in fine texture perception. These ridges may also assist in gripping rough surfaces and may improve surface contact in wet conditions.

Impressions of fingerprints may be left behind on a surface by the natural secretions of sweat from the eccrine glands that are present in friction ridge skin, or they may be made by ink or other substances transferred from the peaks of friction ridges on the skin to a relatively smooth surface such as a fingerprint card. Fingerprint records normally contain impressions from the pad on the last joint of fingers and thumbs, although fingerprint cards also typically record portions of lower joint areas of the fingers.

Read more about FingerprintFor Identification, Absence or Mutilation of Fingerprints, In Other Species, Other Reliable Identifiers

Other articles related to "fingerprint, fingerprints":

Balinese Art - Recent History - Fingerprint Painting
... Ngurah Gede Pemecutan makes his paintings by fingerprints ... If we use brush technique, we can brush it off if needed, but the fingerprint technique should placed every dot precisely ... His fingerprint paintings have no signature, but have a lot of his fingerprints ...
Micro-X-ray Fluorescence
... fluorescence(MXRF) is among the newest technology used to detect fingerprints ... will be able to detect the most complex molecules in fingerprints ... and potassium chloride excreted in sweat are sometimes present in detectable quantities in fingerprints ...
Lipophobicity - Uses
... HD2, Hero and Flyer and many other phones to repel fingerprint oil, which aids in preventing and cleaning fingerprint marks ... A company named "API Corporation" has an "Anti Fingerprint Coating Kit" called "Fusso SmartPhone", which is developed based on oleophobic coating technology, allows the user to add, renew or ...
Shazam Entertainment - How It Works
... works by analysing the captured sound and seeking a match based on an acoustic fingerprint in a database of more than 11 million songs ... Shazam identifies songs based on an audio fingerprint based on a time-frequency graph called a spectrogram ... Shazam stores a catalog of audio fingerprints in a database ...