Body fluid is a term used to describe any liquid substance that originates in the body. Synonyms for this term include bodily fluids, bodily secretions, and biological fluids. These fluids are essential for the proper functioning of the body and can include fluids such as blood, cerebrospinal fluid, urine, sweat, tears, saliva, and breast milk. Each of these fluids serves a unique role in the body and helps to maintain various bodily functions. While most people may associate body fluid with blood or urine, there are many other bodily fluids that are equally important for maintaining overall health and well-being.