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

a) Entry of germs

b) Excessive loss of heat in severe cold

c) Entry of harmful ultra-violet rays.

It provides protection in the following ways:

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

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

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