Do white blood cells have cells in them?

They do not have cells, rather they are themselves made up of cells.

Yes

White blood cells or leukocytes are cells of the immune system that defend the body from disease- causing germs, bacteria, and viruses. They are called white blood cell simply because they're...

White blood cells are animal cells. Therefore they do not have cell walls. Only plant cells have cell walls. Animal cells have a cell membrane which allows more flexibility.

It doesn't have a cell membrane because it needs to change it's form to wrap itself around ifectious diseases