The answer is endoplasmatic reticulum and Golgi apparatus.
Endoplasmatic reticulum forms a network of
flatten tubules in the eukaryotic cells. Ribosomes are attached to the endoplasmatic reticulum. Once proteins have been produced at the ribosomes, they are trasported to the Golgi
apparatus thanks to the presence of endoplasmatic reticulum. In the Golgi apparatus, which consists of flattened sacs filled with fluids, proteins are sorted and sent to the target part of the cell.
