Health

Health is the level of functional and metabolic effectiveness of an organism at both the micro and macro level. In the medical field, health is commonly defined as an organism's skill to efficiently respond to challenges and effectively restore and maintain a state of balance, known as homeostasis.

Another widely established definition of health is that of the World Health Organization which states that health is a state of complete physical, mental and social well-being and not merely the nonattendance of disease or infirmity .In more recent years, this statement has been customized to include the ability to lead a socially and economically productive life. The definition is not without criticism, as some argue that health cannot be defined as a state at all, but must be seen as a process of incessant adjustment to the changing demands of living and of the changing meaning we give to life.