👉 One might expect the most surprising fluid to be water, but let's consider the brain itself. The brain, despite being composed of mostly solid tissue, contains a significant amount of water—about 80%. This fluid, known as cerebrospinal fluid (CSF), isn't just a passive component; it plays a vital role in protecting the brain and spinal cord, cushioning them from impacts, and facilitating the transport of nutrients and waste. It also helps maintain the brain's internal environment, ensuring optimal conditions for neural function. This fluid's movement, known as cerebrospinal fluid dynamics, is surprisingly complex and essential for brain health.
