Why every person has different fingerprints?
It is amazing but true that no two people in the entire world can have exactly same fingerprints. Even twin brothers or two very similar looking persons cannot have same fingerprints. This fact is very useful in solving mysteries and detecting crimes and catching thieves.
The human skin consists of two layers of tissues. The inner layer is thick and is called ‘corium’. The outer layer is a thin membrane and is called ‘epidermis’. In cold-blooded animals, these two layers of the skin fit smoothly one upon the other. There are no ‘ridges’ or grooves to make patterns. But in human beings, there are ‘ridges’ which form certain patterns and these patterns are different in every different person.
Sir Edward Henry, an Englishman, first developed the system of classifying the fingerprints by carefully studying different patterns made by the fingerprints of different person. Even today, the same basic system of classifying fingerprints is used everywhere.
The ridges on human fingers can be divided into these basic patterns – loops, central pocket loops, double loops, arches, tented arches, whorls, and accidentals. By counting the ridges between fixed points in the pattern, each of the ten fingers can be classified into a definite group. The chances that two people will have the same pattern on just one fingers are one in twenty-four million!