👉 The gray fluid, also known as cerebrospinal fluid (CSF), is a clear, colorless, and slightly viscous liquid that surrounds the brain and spinal cord in the human body. It acts as a protective cushion, providing mechanical protection by absorbing shocks and reducing friction between the brain and the skull. Additionally, it plays a crucial role in maintaining the brain's internal environment by transporting nutrients, removing waste products, and regulating temperature. The fluid also facilitates the exchange of substances between the blood and brain tissue, ensuring proper neurological function.
