Why Do We Wrinkle When Wet?

The video explores why skin wrinkles when submerged in water, initially thought to be due to osmosis. However, it was discovered that the wrinkling is an active response of the nervous system, constricting blood vessels to cause the skin to pucker. This involuntary response may have an evolutionary function, providing better grip in wet conditions. A study showed that wrinkled fingers improved grip on wet objects by 12%. Despite this advantage, constant wrinkling is avoided as it reduces sensitivity.

What did scientists initially believe caused the wrinkling of fingers and toes after prolonged exposure to water?

How did the findings of the 1935 study challenge the previous understanding of skin wrinkling?

What role does the nervous system play in the wrinkling of skin according to the text?

What is one theory mentioned in the text regarding the evolutionary advantage of wrinkled skin?

Why might wrinkly skin not be advantageous all the time, according to the text?