Difference between CNS and PNS

The central nervous system (CNS), a component of the vertebrate nervous system that coordinates sensory impulses and the corresponding bodily reactions, is responsible for this coordination whereas the peripheral nervous system (PNS) is the additional component of the nervous system in vertebrates that communicate sensory information to the central nervous system (CNS) and regulate how the body reacts to effector organs.

Here are some of the main differences between CNS and PNS. to help you understand how both differ:



The central nervous system is one of the two main parts of the vertebrate nervous system.

The two main components are the brain and spinal cord. They should be shielded from harm because they are important organs.

The additional soft tissues serve as a structural supplement to the two highly specialized bony protective covers.

The skull and the spinal column are what they are. While the spinal column safeguards the spinal cord, the skull guards the brain.

The forebrain, midbrain, and hindbrain are the three major brain areas that contribute to brain structure.

Most functional mapping for muscular actions, sensory perceptions, and executive functions is mediated by the distinct regions of the forebrain.


The peripheral nervous system is the second element of the nervous system of vertebrates, the body parts, and the central nervous system, it serves as a connecting link.

PNS includes all of the nerves and ganglia for the peripheral nerves as compared to CNS.

Both voluntary and involuntary movements are mediated by two major groups of the peripheral nervous system. There is involvement from both the somatic and autonomic nervous systems.

The autonomic nervous system is a link between all involuntary processes, including blood flow, heartbeat, digestion, and breathing.

The somatic nervous system, in contrast, uses spinal and cranial nerves to coordinate all voluntary motor tasks.

What is the Difference between CNS and PNS?

The peripheral nervous system consists of all the nerves that connect the CNS parts to the muscles, glands, and sensory organs. The central nervous system is made up of the spinal cord and brain tissue. The PNS connects the CNS to the rest of the body.

 The CNS and the rest of the body are linked by the PNS.

Let’s discuss the difference between them as follows:

The brain and spinal cord make up the central nervous system, which is the component of the nervous system in vertebrates.The peripheral nervous system includes the somatic and autonomic nervous systems in vertebrates.
The central nervous system includes the brain and spinal cord.Sensory receptors, sensory neurons, and motor neurons make up the peripheral nervous system.
The central nervous system’s nerve axons are made up of thin projections and transport very brief nerve impulses.Long nerve fibres that can reach a length of 1m make up the peripheral nervous system.
The major function of the central nervous system is to gather, arrange, and analyze information from the sense organs.The central nervous system receives sensory data from the peripheral nervous system and uses it to send motor impulses to the effector organs.
A problem with the central nervous system affects the body as a whole.Damage to the peripheral nerve system affects the body locally.
The majority of nerves in the central nervous system (CNS) are unable to grow new nerve fibres as compared to PNS.The majority of peripheral nervous system nerves are regenerable.


After reading this article you learned a lot about the differences between CNS and PNS, both the central and peripheral nervous systems will make up the nervous system in vertebrates.

The central and peripheral neural systems play a role in regulating body functions.

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