👉 Fluid, in its broadest sense, refers to substances that can flow and change shape to fill any container they occupy. This includes liquids like water, oils, and many household fluids such as blood, saliva, and coolants used in machines. The extent of fluid in a system or environment is determined by its volume, density, and the forces acting upon it. For instance, in biology, bodily fluids like blood play crucial roles in nutrient transport and waste removal, while in engineering, the fluid dynamics of liquids are essential for designing efficient systems like pipelines and hydraulic machinery. The extent of fluid can also be influenced by external factors such as temperature and pressure, affecting its behavior and interactions within a given context.
