Where is it down? And what are some of its functions? So, the Golgi apparatus is a series of flattenmbraneous sacs known as cystiny. So if this is a smoothie r, the Golgi apparatus is relatively close to our smoothie r. And notice it's also pretty large, so we can see it clearly under a microscope. Now, once the proteins are synthesized on the cytosalt side of our rough Er, they are injected, they are forced into our Er lumen, and they travel through the Er lumen into our smoothie r. And from the smoothie r, they are basically ejected into the cytosol by using some type of secretory vesicle. So secretory vesicles carry our proteins from our ruffy r and the smoothie r into the Golgi apparatus.