Hydrogen is pronounced as HI-dreh-jen. History and Uses: Scientists had been producing hydrogen for years before it was recognized as an element. Written records indicate that Robert Boyle produced hydrogen gas as early as 1671 while experimenting with iron and acids.
By Dr Ananya Mandal, MD. The nervous system is a complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body. The nervous system includes both the Central nervous system and Peripheral nervous system. The Central nervous system is made up of the brain and spinal cord and The Peripheral nervous system is made up of the Somatic and the Autonomic nervous systems.
This page outlines the basic physiology of the central nervous system, including the brain and spinal cord. Separate pages describe the nervous system in general, sensation, control of skeletal muscle and control of internal organs. The central nervous system CNS is responsible for integrating sensory information and responding accordingly. It consists of two main components: