👉 The twin fluid, also known as the cerebrospinal fluid (CSF), is a clear, colorless liquid that circulates within the central nervous system. It serves multiple critical functions, including cushioning and protecting the brain and spinal cord from physical impacts, providing nutrients to neural tissues, and removing waste products. The CSF is produced by the choroid plexus in the ventricles and flows through the subarachnoid space surrounding the brain and spinal cord, eventually draining into the venous system. This unique fluid maintains a stable environment for neural function and plays a vital role in overall brain health.