What is the role of the nervous system in the human body?

The nervous system in the human body coordinates and regulates all bodily functions by transmitting signals between the brain, spinal cord, and peripheral nerves. It is responsible for processing sensory information, controlling voluntary and involuntary movements, and regulating essential functions like heart rate, digestion, and breathing. The system also enables cognitive functions, including thinking, learning, and memory. Through neurotransmitters and electrical impulses, the nervous system allows the body to respond to internal and external stimuli, ensuring survival and adaptation.