Here's how they collaborate:
* ER: The ER is a network of interconnected membranes that acts as a protein factory. Ribosomes attached to the ER synthesize proteins, which then enter the ER lumen (the space within the ER). Here, the proteins can be folded, modified, and packaged into transport vesicles.
* Golgi apparatus: The Golgi apparatus is a stack of flattened membrane-bound sacs. The vesicles from the ER bud off and fuse with the Golgi. As the proteins move through the Golgi, they undergo further modifications, sorting, and packaging. Finally, the Golgi sends these proteins in new vesicles to their final destinations within the cell or outside the cell.
So, the ER and Golgi work as a team, with the ER producing and modifying proteins and the Golgi refining, sorting, and distributing them.
