The central nervous system (CNS) is a crucial part of the human body that includes the brain and spinal cord. It is responsible for processing information and coordinating actions by sending signals throughout the body. The CNS plays a vital role in controlling functions such as movement, sensation, and cognition. The CNS works in conjunction with the peripheral nervous system (PNS), which connects the CNS to the rest of the body. Together, they enable communication between the brain and various body parts, allowing for responses to external stimuli and maintaining homeostasis.