Old cells die through apoptosis or necrosis and new cells replace them through cell division and replication. Does this process decrease in frequency over time? Why does that happen?
In: Biology
Each time a cell undergoes [mitosis](https://en.wikipedia.org/wiki/Mitosis), the [telomeres](https://en.wikipedia.org/wiki/Telomere) on the ends of each [chromosome](https://en.wikipedia.org/wiki/Chromosome) shorten slightly. Cell division will cease once telomeres shorten to a critical length. Hayflick interpreted his discovery to be aging at the cellular level. The aging of cell populations appears to correlate with the overall physical aging of an organism
The max number of times a cell can do this is called the hayflick limit.
[https://en.wikipedia.org/wiki/Hayflick_limit](https://en.wikipedia.org/wiki/Hayflick_limit)
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