The wear and tear theory of aging posits that over time, our bodies accumulate damage from environmental factors, including chemical exposure and the effects of free radicals. This theory suggests that cells and tissues undergo gradual deterioration due to ongoing stress and damage rather than a predetermined biological timeline.
As we age, the cumulative impact of this damage can lead to a decline in function and increase the risk of age-related diseases. The free radicals mentioned in the theory are unstable molecules that can cause oxidative damage to cell structures, which contributes to the wear and tear on our bodies. This perspective highlights the role of lifestyle and environmental factors in the aging process, suggesting that minimizing exposure to harmful agents can have a positive effect on longevity and health.
Other theories, such as the mitochondrial theory, focus specifically on the role of mitochondria in aging, while genetic mutation theory centers on changes in our DNA over time. Immune system disorders relate to the functionality of our immune response rather than the accumulation of damage from external factors, making them distinct from the wear and tear perspective.