Why don't humans get crushed by the weight of the atmosphere?

Humans don't get crushed by the weight of the atmosphere because our bodies are filled with fluids and gases that exert pressure outward, counteracting the atmospheric pressure acting on us. Additionally, the atmospheric pressure is evenly distributed across our bodies, so there is no net force that would cause us to be crushed. Our physiological structures are adapted to this pressure, allowing us to function normally in the presence of atmospheric weight.