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Ageing as a Basic Phenomenon of Life i
The Human LifeSpan
The Laws of Ageing
1 other sections not shown
according achievement age-groups ailments already animals average expectation basic become biological body brain cancer capacity cause cells centenarians century changes cholera circulatory system civilized countries climacteric colloidal connection danger death death-rate definite diet disease epidemic existence experience fact factors female function German gerontology growth heart higher homo sapiens human important increase individual infant infection insulin intellectual investigation large number later less life-span living longer lymphatic system matter means mental activity metabolism methods modern mortality rate muscular system Nature normal occur old age older particularly patient period pernicious anaemia person phase physical physiological point of view polio population possible problem process of ageing produced psychological reached reason regarded regression rejuvenation Robert Koch scarlet fever scientific senile senile dementia sense sixty so-called spite stage statistical sympathetic nervous system symptoms tissues tuberculosis typhus unicellular organisms whilst women workers young younger youth