Question

WHY DOES THE SKIN OF OUR FINGER SHRINK WHEN KEPT IN WATER FOR A LONG TIME?

Answer 1

It happens due to Osmosis. Water moves out of our skin.

Answer 2

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When we wash clothes, our hands are exposed to water for a long time. Our hands behave as a hypertonic solution and the outside of our hands behave as a hypotonic solution. Our skin behaves as a semi-permeable membrane as it is porous. So actually the water is not absorbed here just leaving and thus it shrinks.