Understand the nervous system. Learn about the central and peripheral nervous systems, somatic and autonomic, sympathetic and parasympathetic nervous systems.

The nervous system is the collection of cells, tissues, and organs that control electrochemical communication in the body. What is the main function of the nervous system?

The primary peripheral nervous system function is to relay messages back and forth from the central nervous system (CNS), the nervous system made up of the brain and spinal cord.

Central nervous system: The CNS is the processing center of the body and is composed of the brain, the most complex organ in the human body, and the spinal cord.

Learn about the sympathetic nervous system and the parasympathetic nervous system, including what they do and how their functions affect the human body.

The peripheral nervous system contains the many nerves that extend from the brain and spinal cord and articulate with other structures in the body. Fish brain anatomy is often divided into four ...

The central nervous system is a part of the nervous system composed of two distinct organs, the brain and the spinal cord. The central nervous system is also referred to as the CNS, as an ...

Learn the parasympathetic nervous system, its definition and function in the body. Identify parasympathetic nervous system location and its activation process.

Explore the central and peripheral nervous systems in this engaging video. Learn their functions and how they work together, then test your knowledge with a quiz.

Learn about the somatic and autonomic nervous systems. See how somatic vs autonomic within the peripheral nervous system. Find out about neurons and receptors.