Question: If a cell dies how long does it take for that one cell to be replaced?

Andrew Devitt answered on 18 Jun 2013:

It has probably already been replaced before it dies! We are always making new cells and then killing off the old and unwanted ones at the same time.

In the gut, you find new cells are made and these squeeze the old cells out into the gut where they get pooped out with the rest of your waste