How can age pigments accumulate in heart muscle cells and nerve cells?

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life span The mayfly (*Ephemera danica*) has a short life span, with adults living only one day.

The accumulation of age pigments, specifically lipofuscin, is a characteristic change in cell morphology associated with the aging process.

In tissues such as the heart and brain, lipofuscin accumulates within the cells over time. While this pigment is not detectable in humans at a young age, it gradually increases throughout the lifespan. By old age, lipofuscin can account for a measurable percentage of the total cell volume in heart muscle cells. This process is part of a broader trend where inert or potentially deleterious materials build up within and between cells as tissues become less efficient at managing waste products and maintaining cellular integrity.1