Why Do We Age If Our Cells Are Constantly Renewing?

One of the hottest topics in popular science is based on the complete regeneration of our body every 7 years. But this claim is actually a popular science how misleading it can be A good example of.

Just as like the fallacy that we only use 10% of our brain, The fact that our body is completely renewed every 7 years is also a claim far from reality.

Our body does indeed partly renew itself at regular intervals.

For example, skin cells are renewed every twenty days, white blood cells are renewed every year, and our bones are completely renewed every ten years. But in our body Not every organ is regenerated.

For example Our tooth enamel always stays the same. Egg cells in women are never renewed. Almost half of our hearts are never renewed until we die.

You see, there is no such thing as a renewal every 7 years, anyway. This is exactly why we age. So why do our regenerated tissues age?

For example, if our bones are replaced every ten years, Why do old people have weaker bones? Even though our skin cells regenerate every twenty days, why doesn’t old people’s skin look as good as younger people’s?

The interesting part of the work begins with exactly this question.

Every cell in our body has life cycles of birth, reproduction and death. Our DNA in our cells is protected by telomeres at the ends. But with each division of the cell, these telomeres get shorter and shorter, and after a sufficient number of divisions, they are almost completely destroyed.

This situation, Causes DNA damage and the split operation no longer occurs. The cell also gradually dies and disappears. In other words, the lifespan of cells, and therefore of us, depends on the length of our telomeres.

A second situation is that after each cell division, the errors in the cells are transferred to new cells. So even if we create new cells, errors that old cells have, innate to these cells. They are weak from the start, have many bugs and are quite inefficient. In other words, new cells do not appear.

The third and final case is that the cells progressive weakening of repair mechanisms. Because the repair mechanisms have more errors as a result of these duplications in each division and become completely dysfunctional over time. Thus, more and more of our cells become unable to repair themselves and reproduce.

As a result of these three reasons, even if your cells are still being renewed after an average life of 75 years, your healthy and strong cells The number is drastically reduced.

This is your body makes it weak and we experience what we call old age. Behind the scenes, exactly like this…