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ICSE Class 9 Biology Question 1 of 12

Skin - "The Jack of All Trades" — Question 3

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Question

Question 3

How does our skin provide protection to our body against the following?

  1. Entry of germs

  2. Excessive loss of heat in severe cold

  3. Entry of harmful ultra-violet rays.

Answer

It provides protection in the following ways:

  1. Entry of germs — The skin checks the entry of toxic substances or the agents causing infection into the body.

  2. Excessive loss of heat in severe cold — The skin prevents loss of heat in cold weather and facilitates loss of heat in hot weather.

  3. Entry of harmful ultra-violet rays — It protects the body against excess ultra violet light which is potentially very harmful.