This is what the inside of our brains look like when we are thinking. How Nerve Cells Communicate The brain makes sense of our experiences by focusing closely on the timing of the impulses that flow through billions of nerve cells
A cross section of a bundle of nerve fibers. Axons (orange) are wrapped in myelin (purple); an extension of the membrane of glial cells. Myelin has high lipid content, and acts to insulate the axons, causing them to transmit nerve impulses much faster.
These cells line the Choroid Plexus, a layer of tissue that lines the inside of the ventricles of the nervous system. The swollen tips of these cells secrete the cerebrospinal fluid which bathes the brain in glucose and proteins, and prevents it from.