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The human brain is a complex and highly developed organ that plays a central role in controlling the body's movements, regulating emotions, and enabling thought and perception. The brain operates on electrical impulses and chemical signals, allowing it to process vast amounts of information and make decisions rapidly. Humans have an average brain size of about 1,300 grams, but this can vary significantly from person to person due to factors such as genetics, diet, and lifestyle. Research has shown that brain development continues throughout childhood and adolescence, with significant changes occurring in the teenage years. The human brain is composed of many different regions, each with its own unique function. The cerebral cortex, for example, is responsible for processing sensory information, controlling movement, and facilitating thought and memory. Other key areas include the cerebellum, which coordinates motor movements, and the limbic system, which regulates emotions. Despite its incredible complexity, the human brain remains a mysterious and largely unexplored territory. Scientists continue to study the brain using advanced techniques such as functional magnetic resonance imaging (fMRI) and electroencephalography (EEG), but much remains to be discovered about how it works and how it can be improved.