Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated August 2025
Definition
The nervous system is a complex network of nerves and cells that transmit signals between different parts of the body. It's divided into two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS).
AP course connection
Topic 2.3: 2.3 Overview of the Nervous System and the Neuron
This is made up of the brain and spinal cord. It processes information received from all parts of the body.
Peripheral Nervous System (PNS): This consists of all other nerve tissues in the body outside of the CNS. It connects all parts of the body to the CNS.
Autonomic Nervous System (ANS): A part of PNS that controls involuntary actions such as heartbeat or digestion.