The Neuron's Helper Cells
Glial cells are specialized cells in the brain and spinal cord that form the myelin sheath.
Glia means glue.
These cells hold neurons together. They remove waste products by eating them. They handle other manufacturing, nourishing, and clean up tasks as well.
When the brain is first developing the glial cells act as guides, taking the specialized neurons from where they are formed to were they will finally function.
Glial cells are smaller than neurons and outnumber then about nine to one.
They make up more than half of the volume of the human brain.