| | Conditions Treatments | Brain Nervous System What system does the brain belongs to? The brain is the central organ of the nervous systems, and as such, it forms part of the central nervous system. Brain Nervous System - Related Articles Emergency Preparedness Training What Is Social Anxiety Disorder or Phobia? How Do I Get a Good Denture Fit? Can wisdom teeth cause poor eye sight? ADHD Medication & Behavior Therapy Combined Treatment Is syphilis more common in women or men? What Are the Dangers of Jet Exhaust?