Ageing Theories in Stem Cell

Ageing is the complex process of deterioration of body functions through involvement of body cells and organs. Basically the ageing theory can be divided into two types – hematopoietic stem cell ageing and hair follicle stem cell ageing. Besides these two theories, the other theories of ageing are evolutionary theory, cellular theory, system theory and molecular theory. With ageing the bone marrow cellularity decreases.