The Nervous System



The Nervous System 2714
Photo by: Sebastian Kaulitzki

7 The Nervous System

The nervous system is the master controller of the body. Each thought, each emotion, each action—all result from the activity of this system. Through its many parts, the nervous system monitors conditions both within and outside the body. It then processes that information and decides how the body should respond, if at all. Finally, if a response is needed, the system sends out electrical signals that spur the body into immediate action. Although one of the smallest of the body's systems in terms of weight, the nervous system is the most complex and versatile.

Design: parts of the nervous system

Workings: how the nervous system functions

Ailments: what can go wrong with the nervous system?

Taking care: keeping the nervous system healthy

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