bhe aim of the book was not to focus the age-dependentmodifications of one specific biological systems orphenomena, but the attempt was pursued to cover severalfields in which the biological research on aging is goingon. The fundamental purpose of this planning was to offerthe PhD students an advanced text that could raise thepossibility of an interdisciplinary discussion on a wideand complex field that is very suitable to be utilized asan example of the connection existing between advancedteaching and experimental research.