Our body not crushed by the atmospheric pressure because

Atmospheric pressure and pressure inside our body cancel each other because the atmospheric pressure and pressure inside our body balance each other. The pressure inside our body comes from the pressure exerted by the blood on the surrounding walls of the veins and arteries, fluids present inside our rigid cells, and air present inside our lungs, stomach, ears, etc. This internal pressure is enough to balance the atmospheric pressure exerted from the outside.