👉 A useful fluid, often referred to as a biological or physiological fluid, is a substance produced by living organisms that plays a crucial role in maintaining life and facilitating various bodily functions. These fluids include blood, lymph, synovial fluid, cerebrospinal fluid, and mucus, each serving specific purposes such as transporting nutrients, removing waste, lubricating joints, protecting tissues, and maintaining the internal environment. Understanding these fluids is essential in fields like medicine and biology as they provide insights into health, disease, and the body's complex systems.
