👉 A rare fluid, often referred to as a biological or cellular fluid, is a complex mixture of substances found within and around cells in living organisms. This includes water, electrolytes, proteins, sugars, lipids, and various organic molecules essential for cellular function and homeostasis. Unlike typical bodily fluids like blood or synovial fluid, rare fluids can have unique compositions and properties specific to certain tissues or organs. For example, cerebrospinal fluid (CSF) is a rare fluid that cushions the brain and spinal cord, while vitreous humor is another rare fluid found in the eye. These fluids play critical roles in maintaining the environment necessary for cellular health and function, and their composition can vary significantly depending on the body part they inhabit.
