On average, the brain weighs between 1.3 to 1.4 kg, with about 60% of the brain consisting of fat. The remaining 40% of the brain consists of protein, water, carbohydrates, and salts. The brain can be divided into four distinct regions: the brainstem, cerebrum, cerebellum, and diencephalon. Taken together, these different areas of the brain control thought, memory, emotion, touch, motor skills, vision, breathing, hunger, temperature, and all other processes that occur within the body.