Question

6. Srinidhi is a five-year-old girl who joined the swimming classes. After the first class, she was worried
when she saw her wrinkled fingers. She asked her elder sister about the wrinkling and shrinking of her
12)
fingers. Her sister explained Srinidhi why it was so.
(a) Why did the fingers wrinkle after swimming ?
(b) Explain the reason of shrinking/wrinkling of fingers?​

Answer 1

Answer:

a) Fingers wrinkling is an involuntary action caused by our autonomic nervous system. The wrinkling is caused by blood vessels constricting below the skin. Its an evolutionary function that improves our grip so that we can easily grab submerged objects

Explanation:

b) The nervous system sends a message to the blood vessels to become narrower. The narrowed blood vessels reduce the volume of the fingertips slightly, causing loose folds of skin that form wrinkles