As I understand it, most chemotherapy targets only dividing cells. In adult humans there are relatively few of these: cancer cells (which you want to kill), bon

As I understand it, most chemotherapy targets only dividing cells. In adult humans there are relatively few of these: cancer cells (which you want to kill), bone marrow (produces blood cells, so you have to monitor blood cell counts during chemo), and reproductive organs (produce gametes, so you may want to freeze sperm/eggs before chemo).