Wrinkles

Why do our wrinkles look like raisins?

Well, scientists thought that it was some kind of osmosis, but it did not happen if the patient had nerve damage.

One patent was a boy with nerve damage in three of his fingers, and he could not feel anything from those and felt numb, and when they put his hand in the water, it was only the fingers that he could feel from got wrinkles. The numb ones did not have wrinkles, but the normal ones did.

It is actually the nervous system's response to extended contact with moisture, the nervous system actually constricts the blood vessels and that constriction is the reason why your fingers have risen.

Biologists think that it may be because of evolution. One theory says "maybe because of better grip underwater". How they tested this is scientists took two groups of wrinkly and non-wrinkly fingers,  and they were requested to both groups to pick up a smooth object, wet marbles and dry marbles, and they found out that the group that had wrinkly fingers picked up their wet marbles 12% faster, but the dry marbles around the same time.

Go swimming and have wrinkly fingers.