It controls body temperature, blood pressure, heart rate and breathing.
It accepts a flood of information about the world around you from your various senses (seeing, hearing, smelling, tasting and touching).
It handles your physical movement when walking, talking, standing or sitting.
It lets you think, dream, reason and experience emotions.All of these tasks are coordinated, controlled and regulated by an organ that is about the size of a small head of cauliflower.