title: Basic gerontology.
mesh_terms: D000375:Aging; D000818:Animals; D005075:Biological Evolution; D001835:Body Weight; D001921:Brain / Q000033:anatomy & histology; D002470:Cell Survival; D002478:Cells, Cultured; D003593:Cytoplasm / Q000502:physiology; D004032:Diet; D005347:Fibroblasts / Q000502:physiology; D005823:Genetics; D006801:Humans; D008136:Longevity; D008433:Mathematics; D008954:Models, Biological; D009929:Organ Size; D012737:Sex Factors