Not on the individual cell level. Human cells last days to months ... continually replaced by division. Over time all of our cells are replaced. I guess all oth

Not on the individual cell level. Human cells last days to months ... continually replaced by division. Over time all of our cells are replaced. I guess all other cellular organisms are like that. Question of definition whether clones are the 'same individual organism'. More details here. https://en.wikipedia.org/wiki/List_of_longest-living_organisms https://en.wikipedia.org/wiki/List_of_longest-living_organis... Then there's this possibly immortal jellyfish. https://en.wikipedia.org/wiki/Turritopsis_dohrnii https://en.wikipedia.org/wiki/Turritopsis_dohrnii