Theories of Ageing
There are many theories of Ageing. In 1990 Mevdevev in a brilliant analysis identified that there were more than 300 theories of ageing and the number is increasing. This is the natural importance of the fact that we are rapidly improving our understanding of the natural occurrences that are connected with ageing using new investigational procedures and ideas. In fact, nearly any major finding in cellular and molecular biology has given rise to a new family of theories of ageing or to enhanced versions of old ones. Thus, the task of revising these theories is becoming more difficult because they are either very selective or they are now old fashioned. This was pointed out by Vijg and Muller. Some of the old theories of ageing placed the ground for the big scientific revolution of ageing, which happens in our days. We believe that the belief of a combined theory which includes all the phenomena related with ageing this evaluation, to offer an initial solution to the problem of offering acceptable theories of ageing, which can monitor new investigates that will increase our understanding of ageing at the various levels of biological association. The cellular theory of ageing assumes that the ageing procedure is the result of the incapability of various types of stem cells to continue to reload the tissues of an organism with functional distinguished cells capable of continuation that tissue's original function. Damage and error accumulation in genetic material is always a problem for systems irrespective of the age.