Pressures: Atmospheric Pressure, Hydrostatic Pressure, Osmotic Pressure Pressure is a measure of the force applied per unit area. In various biological, physical, and chemical contexts, pressure plays a crucial role in determining the behavior of fluids, gases, and even cellular functions. Understanding different types of pressure is essential for comprehending various physiological and environmental processes. This includes atmospheric pressure, hydrostatic pressure, and osmotic pressure, which have distinct properties and applications.