Why do fingers wrinkle in water?
Show answer & explanation
Answer: Nervous system creates grip
Nervous system creates grip ✓ — Correct! Pruney fingers aren't passive water absorption—your nervous system triggers it! The wrinkles improve grip on wet objects, like tire treads. People with nerve damage don't get wrinkly fingers. It's an evolved adaptation!
Blood leaves fingertips — Wrong. Blood flow isn't reduced. The wrinkles are caused by blood vessel constriction controlled by nerves.
Oils wash away — Wrong. Oils washing away would cause dryness, not wrinkles. The nervous system actively creates the pattern.