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The Nervous System  Introduction The human body is a remarkable machine made up of trillions of cells that work together to perform various functions. Among the many systems that control and coordinate these functions, the nervous system plays a central role. It acts like the body’s communication network, allowing different organs to share information quickly and efficiently. Whether it’s the sensation of heat, the sound of a bell, or the decision to move your hand, the nervous system ensures everything works in harmony. For students of Class 9 Biology , understanding the nervous system is essential as it lays the foundation for future studies in biology, health sciences, and human physiology. This article will help you understand the structure, function, components, and significance of the nervous system in a simple yet detailed manner. What is the Nervous System? The nervous system is a complex network of neurons (nerve cells) , the brain , spinal cord , and nerves that ...