👉 Fluid, in the context of ongoing processes, refers to substances that are in a state of constant motion and transformation. This includes liquids, gases, and plasmas, which are characterized by their ability to flow and change shape while maintaining their chemical composition. In biological systems, fluids like blood, lymph, and synovial fluid play crucial roles in transporting nutrients, removing waste, and lubricating joints. In geological contexts, fluids such as groundwater, magma, and hydrothermal solutions circulate within the Earth's crust, driving processes like erosion, volcanic activity, and mineral deposition. Essentially, fluid dynamics describes the continuous movement and interaction of these substances, which are essential for sustaining life and shaping planetary environments.
