What is the function of human fingerprints?

Fingerprint on finger is one of human characteristics, which varies from person to person. A foreign scientist investigated the fingerprints of hundreds of thousands of people and found that none of them are the same, even twin brothers and sisters. Using fingerprints to catch criminals has become a method for public security organs to solve crimes. The palm accounts for about 1/2 of the whole hand area, and it also contributes a lot to the completion of human hand movements.

The epidermis of the palm is the thickest part of human skin, about 4 mm; The skin on the back of the hand is very thin, soft and elastic, which is very conducive to holding things. Where the palm is often rubbed, the skin layer will thicken and form small protrusions to protect the endothelium. This is the "calluses", which also shows that the palm has the function of holding things.

Most people have three or four palm prints on their palms, which naturally wrinkle when they are clenched. Although different, they are all irregular arcs and inclined to each other. A doctor who is committed to the study of genetic function found that more than 70% of the palmprints of children with congenital malformation and their parents are parallel straight lines, so he put forward a set of theories to study the genetic causes with palmprints.

Tell the brain all kinds of "information" such as cold, hot, soft and hard, and then the brain gives orders and directs actions according to these "information". Fingerprints also have the function of enhancing skin friction, so that fingers can hold things tightly and it is not easy to slide down. We usually draw, write, take tools and do manual work, so we can be so responsive and use it freely, and have fingerprints working in it.

It is said that more than 100 years ago, the police began to solve crimes with fingerprints. Now, with the development of science and technology, fingerprints have new uses in medicine. Some doctors find that some diseases can be detected by checking people's fingerprints and palm prints. (3) In recent years, fingerprints have become good friends of computers.