How Your Brain Works

Water on the Brain

The human brain's ventricular system

Your brain and spinal cord are covered by a series of tough membranes called meninges, which protect these organs from rubbing against the bones of the skull and spine.

For further protection, the brain and spinal cord "float" in a sea of cerebrospinal fluid within the skull and spine. This cushioning fluid is produced by the choroid plexus tissue, which is located within the brain, and flows through a series of cavities (ventricles) out of the brain and down along the spinal cord. The cerebrospinal fluid is kept separate from the blood supply by the blood-brain barrier.


As you can see, your brain is a complex, highly organized organ that governs everything you do. Now that you are familiar with the anatomy of the brain, keep reading for more articles on how it works.

Related Articles


  • Bryn Mawr University. "Brain Structures and their Functions." June 3, 2005. (June 13, 2011).
  • Children's Hospital Boston. "The Neuron." 2007. (June 13, 2011).
  • "Anatomy of the Brain." Feb. 28, 2011. (June 15, 2011).
  • McGill University. "The Brain From Top To Bottom." (June 14, 2011).
  • National Geographic. "Command Central." 1996-2011. (June 14, 2011).
  • The Science Museum. "What makes the human brain unique." (June 13, 2011).
  • Washington University, Neuroscience for Kids. "Types of Neurons." 1996-2011. (June 13, 2011).