Your fingers have friction ridges so that we can grab or catch or even hold things with our fingers. If we did not have these friction ridges then probably we wouldn't be able to hold things without the help of our fingers.
The same time they form their fingers/hands in the womb
Friction is caused by the movement against anything, including the atmosphere, which grows thinner and thinner as you leave the planet. (It is also why planes fly so high in altitude - less friction means greater miles per gallon of jet fuel.) As an experiment, part your fingers such that there is air (or space) between them all; then run your wrist either side to side or forward and backward very rapidly so that you will feel the friction of the air against your fingers. This cannot happen in a vacuum of space, not that you could even attempt it.
folding uplift and erosion
Impressions of fingerprints may be left behind on a surface by the natural secretions of sweat that is present in friction ridge skin, or they may be made by ink or other substances transferred from the peaks of friction ridges on the skin to a relatively smooth surface.
1. Static2. Sliding3. Rolling4. Air5. Fluid
Dermal ridges cause the overlying epidermis to form epidermal ridges. Collectively these ridges are called friction ridges.
The same time they form their fingers/hands in the womb
pattern
fingerprints
friction ridges
Papillary Layer
my wife
It is an impression left by the friction of ridges of a human finger.
To assist in our ability to grasp and hold onto objects
to grip with you couldn't hold on to nothing with slick fingers
They enable us to grasp objects.
fingers, palms, heels, and toes