Are all bacteria prokaryotic cells?
Normally, all of bacteria are prokaryotic without any exception. However, a prokaryotic bacteria can be changed to equip eukaryotic metabolism artificially.
European researchers have modified the cellular machinery of Escherichia coli to produce a system for the production of proteins relevant for eukaryotic, particularly human, applications. E. coli, like most bacteria, fail to glycosylate the proteins they synthesize, but this system could change all that.
Well, prokaryotic cells are not really part of the body. A prokaryotic cell is pretty much the same as Bacteria. Are we made of Bacteria? No, we have bacteria in us but we are not made of Bacteria. The above statement is true. But! While Bacteria are prokaryotes, the reverse is not true. Archean cells are also prokaryotic. And! We actually have more prokaryotic cells in and on us then eukaryotic cells.