Question

What is the importance of atmospheric pressure

Answer 1

Atmospheric pressure primarily hold us in shape. If this pressure disappeared suddenly we would start expanding due to the air inside our body and burst.

Also the blood in our arteries would surge to the surface of our skin as the blood pressure 120/80 mm of Hg is so regulated that it is lower then the atmospheric pressure 760 mm Hg.

We would die of suffocation as with zero pressure outside ,our lungs would contract just once, all the air would get evacuated and then there would be no air to inhale. I guess it would result in almost immediate death. It would be like throwing a person into a vacuum chamber. Clean and neat way of terminating everybody.

Of course there are numerous other reasons why atmospheric pressure is important i have high lighted the main importance.

Answer 2

The atmosphere protects living things from the Sun's most harmful rays. Gases reflect or absorb the strongest rays of sunlight (Figure below). The atmosphere shields Earth from the most harmful solar rays.