Now, what exactly is the difference between cytosol and cytoplasm because the two are sometimes confusing or confused. Basically, the cytoplasm is the region between the cell membrane and the nucleus. And the cytoplasm includes all the organelles and all the structures found between these two sections. So that includes the mitochondria, which we'll discuss next. That includes the ribosomes, the goldie apparatus, the vesicles, our er, and everything else in between the cell membrane and the nucleus. Now, the cytosol is not exactly the cytoplasm.