As we grow from birth through old age, we are biologically g…

As we grow from birth through old age, we are biologically governed by what Leonard Hayflick discovered about cellular division. He found that normal body cells can divide and replicate approximately 50 times. Because we lose ____ from the ends of the chromosomes with each cellular division, the new cells are never as healthy as the old cells. This is the primary effect we refer to as “aging.”