Why is the fingertip the most tactile place?

Among the most tactile parts are the hands, the tongue, the lips, the legs, the touch of the hand is the best place to feel. Sensory organs at the fingertips are distributed relatively much (Photo: nsf.gov)

  People can use their hands to feel the shape, temperature, brightness of the object, thanks to the tactile parts at the fingertips to feel the outside. This function of the hand is relatively important for daily living. Why is the tactile feel at the fingertips so sensitive?

That's because our skin layer has a lot of sensory nerve endings, which can transmit sensory signals of heat, cold, pain, . to a brain judged by the brain. On every ² centimeters of skin there are about 12 hot receptors, more than 100 cold sensory organs, 25 sensory organs of touch. Sensory organs in the fingertips are distributed relatively much, so the tactile function at the fingertips is most developed .

If specially trained, the sensitivity of the fingertip can be greatly enhanced compared to normal. For example, in blind people can read Braille books fluently, this type of book is entirely due to hand contact with the words that are engraved on the paper that can be read.