WHY DO FINGERS ABSORB WATER AND BECOME WRINKLED?

Why do my fingers absorb water and become wrinkled?

•Human finger tips do not become wrinkled, because they absorb water.

•Skin is a fairly good barrier that keeps out most of the external water.

•If our fingers did absorb a significant amount of water after staying in the pool or bath for several minutes, then our fingers would swell to round, plump shapes, which is the opposite of wrinkling.

•The wrinkling is actually caused by a reduction of fluid inside the finger tips.

•How can our finger tips experience reduced fluid internally when exposed to increased fluid externally?

•From a physical perspective, this effect seems to be a paradox. The answer is that the wrinkling of wet finger tips is an active biological response, rather than a passive physical effect.

•Scientists have known for almost a hundred years that nerve damage in the hand can result in a person no longer being able to get wet-induced finger wrinkles. Finger wrinkling is therefore controlled by the nervous system.

•Nerve signals cause blood vessels in the finger tips to constrict, reducing the amount of fluid in the finger tips. Just as drying out a grape causes it to turn into a wrinkled raisin, the reduction of fluid in the finger tips causes them to shrivel and wrinkle.

•Since finger wrinkling is an active neurological response, it is likely that evolution selected for it because this response confers some type of survival advantage.

•Wet-induced wrinkles may, in fact, be substantially superior to 'rain treads' on shoes, which maintain a tread even when under compression and thus have a surface area of contact that is reduced.

•Wet-induced wrinkle treads, on the other hand, are pliable, and the act of pressing a finger tip down on a wet surface 'squeezes' the fluid out from under the finger through the channels, and upon completion of this single pulsatile flow the entire finger's skin contacts the surface."

•A human with an improved grip can better handle tools and weapons in the rain, as well as retrieve food from rivers and streams. In this way, the wrinkling of fingers in response to water could have provided a significant survival advantage to our ancestors.

Comments

Why do the Indian telecom operators offer their services with 28 days validity, not 30 days?😡😡

Here telecom operator are very clever, b ecause telecom operators want to earn money of 13 months instead of 12 months. Let do the calculation and find out why telecom operators are offering 28 days validity. Each month they get 2 days more, therefore in a year they get additional 24 days. There are 7 month which has 31 days so they get additional 7 days.Now in case of February ,it has only 28 days not 30. So the total number of days they get are=24+7-2=29 days. So if you recharge 12 times then more 29 days are left in a year.🤔🤔 Means for another 29 days you have to recharge from that telecom operator.😫😫 So you have to recharge 13 times in a year instead of 12 times in a year. So telecom operators provide 28 days validity only. First one telecom operator started and then another telecom operators also understood this concept and they also applied 28 days validity both in data packs and voice packs.😱😱😱

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