Final answer:
The two main divisions of the human nervous system are the central nervous system (CNS), comprising the brain and spinal cord, and the peripheral nervous system (PNS), which connects the CNS to the rest of the body.
Step-by-step explanation:
The Two Main Divisions of the Nervous System
The two main divisions of the human nervous system are the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS is comprised of the brain and spinal cord, which are the primary hubs for processing and relaying information throughout the body. The PNS connects the CNS to other parts of the body, ensuring communication between the brain, spinal cord, and the rest of the body. The peripheral nervous system is further subdivided into the somatic nervous system, which controls voluntary movements and sensory information, and the autonomic nervous system, which regulates involuntary functions such as heart rate and digestion. The autonomic system is also divided into the sympathetic and parasympathetic systems, which have opposing effects on the body's functions.