The brain performs an incredible number of tasks: •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, touching, etc). •It handles physical motion 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: your brain.
Complex part of the human body human brain is the center of the human nervous system. Enclosed in the cranium, it has the same general structure as the brains of other mammals, but is over three times as large as the brain of a typical mammal with an equivalent body size. The human brain has been estimated to contain 80 or 90 billion non-neuronal cells (glial cells) as well as 80 or 90 billion neurons, of which about 10 billion are cortical pyramidal cells. These cell pass signals to each other via as many as 1000 trillion synaptic connection the brain monitors and regulates the body's actions and reactions. It continuously receives sensory information, and rapidly analyzes these data and then responds, controlling bodily actions and functions. The brainstem controls breathing, heart rate, and other autonomic processes that are independent of conscious brain functions. The neocortex is the center of higher-order thinking, learning, and memory. The cerebellum is responsible for the body's balance, posture, and the coordination of movement. Despite being protected by the thick bones of the skull, suspended in cerebrospinal fluid, and isolated from the bloodstream by the blood-brain barrier.