Eli5 why can’t organisms regenerate tissue indefinetly, why do we die of old age
In: Biology
The simple answer is errors. There are errors that occur in every system. You would think for example that computers don’t have errors but they do.
With biological systems the errors tend to not be able to be corrected consistently. The errors I am referring to are ones that occur with DNA replication and with cellular division. These errors accumulate over time and render the problems we association with old age.
Humans, experience wear and tear, joints wear out. There is not a system inside us for replacing the disks of the spine etc.
Other parts of our body, like the interior of the mouth get damaged and generally repair just fine.
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