CHaracteristics of fingerprints
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Fingerprint chacteristics are named for their general visual appearance and patterns. These are called loops, whorls, and arches. About 65 percent of the total population has loops, 30 percent whorls, and 5 percent have archs. Arches have ridges that enter from one side of the fingerprint and leave from the other side with a rise in the center. Whorls look like a bull's-eye, with two deltas (triangles). Loops enter from either the right or the left exit from the same side they enter.
Two things a forensic examiner looks for on a fingerprint are the presence of coe and deltas. The core is the center of a loop or whorl. A triangular region located near a loop is called a delta. Some of the ridge patterns near the delta will rise above and some will fall below this triangular region. Sometimes the center of the delta may appear as a small island. A ridge count is another characteristic used to distinguish one fingerprint from another. To take a ridge count, an imaginary line is drawn from the center of the core to the edge of the delta.
Two things a forensic examiner looks for on a fingerprint are the presence of coe and deltas. The core is the center of a loop or whorl. A triangular region located near a loop is called a delta. Some of the ridge patterns near the delta will rise above and some will fall below this triangular region. Sometimes the center of the delta may appear as a small island. A ridge count is another characteristic used to distinguish one fingerprint from another. To take a ridge count, an imaginary line is drawn from the center of the core to the edge of the delta.