The heart is usually located on the left side of the body but in some cases and in individuals, it can be located on the right side of the body.

I remember learning this from some movie, because it was the main twist! I don't remember the movie itself but I think they shot the guy in the heart or something but he survived cos his heart was on the other side! Then I googled and found out that it's real!

the cells of the heart stop dividing at the very early stage of life

Are there downsides to this? Like if something happens to the heart's cells, they can't get replaced for example?