3 ms·

Aren't cells replaced periodically?

• space_fountain 4y ago
  Yes, but in a very controlled way, typically with a fixed number of total devisions. Understanding aging is a slow process, but as far as I know current thought is that it has a lot to do with that replacement slowing down for a variety of reasons. This slow down seems like it may somewhat be a tradeoff with cancer though. Cells that divide too robustly end up cancer, cells that sort of shutdown instead are known as senescent and seem to contribute to aging