Have you ever stayed in water long enough to notice the skin on your fingertips becoming wrinkled? It may seem as though your fingers are simply absorbing water and swelling, but that common explanation is not accurate. Scientists now understand that the change is actively controlled by the nervous system. After several minutes in water, signals from the body cause tiny blood vessels beneath the skin of the fingertips to constrict. As those vessels narrow, the skin above them is pulled inward, creating the familiar ridges and wrinkles…. Continue Reading 🔽
