Its a common myth that our cells all die and are replaced by new ones, but that is not actually true, it is true for the vast majority of cells tho.
One of the most extreme example where this is not true, are the female gametes aka the egg cells. They are all created before birth and are never replaced. Quite the opposite of the male counterpart where the production of gametes starts 10+ year after birth and usually continues for the rest of the life.
One of the most extreme example where this is not true, are the female gametes aka the egg cells. They are all created before birth and are never replaced. Quite the opposite of the male counterpart where the production of gametes starts 10+ year after birth and usually continues for the rest of the life.