System is an organization of functionally interactive units for the achievement of a common goal. All systems have inputs, outputs, and feedback, and maintain a basic level of equilibrium. For example, in the human body the heart functions to support the circulatory system, which is vital to the survival of the entire body.
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H1N1 Flu and Homeopathy – Analysis
What is H1N1 flu ? H1N1 virus is a new type of Influenza virus affecting pigs, humans and maybe some other animals. Humans do not yet have herd immunity to it as they do to other types of flu viruses.