The function of the brain is to serve as the central control unit for the body, coordinating all bodily functions and activities. It processes sensory information, regulates emotions, and facilitates cognitive functions such as thinking, learning, and memory. The brain is responsible for voluntary actions and involuntary reflexes, ensuring that the body responds appropriately to internal and external stimuli. Additionally, the brain plays a key role in behavior and social interactions. Its complex network of neurons communicates through electrical and chemical signals, allowing for intricate communication within the nervous system.