There is an abundance of evidence to support the importance of the influence of the environment on organic systems.  Most singers are aware that certain musical phrases are ‘vocal,’ whereas others of different design are considered ‘unvocal.’  ‘Vocal’ phrases create an environment favorable to the continued health and well-being of the mechanism, while those viewed as ‘unvocal’ have the opposite effect.  Unquestionably, it is the musical environment contained within a song, aria or vocal exercise, whose special constructs are critical to artistic expression, as well as exerting an overall benefit to all aspects of mechanical functioning.