About this deck
Average life expectancy in 1900 hovered around the mid-40s. Today it sits near 79 in high-income countries — but the gain came mostly from preventing infants and young adults from dying, not from extending old age. Key sections include: AGING / The mechanics of getting older; We almost doubled the human lifespan in a century.; The Hayflick limit, 1961.; The hallmarks of aging.; Genomic instability.; Telomere attrition.; Epigenetic alterations.; Mitochondrial dysfunction.; Cellular senescence — the zombie cells.; Stem cell exhaustion..
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