What are the roles of endoplasmic reticulum and ribosomes in protein synthesis?

Since ribosomes are the site of protein synthesis, we can say that ribosomes are directly involved in protein synthesis while endoplasmic reticulums indirectly participate in it. This is explained by the presence of robosomes on the surface of the rough endoplasmic reticulum. Thank you

The endoplasmic reticulum (ER) provides a structural framework for protein synthesis and transportation, while ribosomes are responsible for the actual synthesis of proteins. Ribosomes translate the genetic code from mRNA into amino acids, which are then assembled into proteins. The ER assists in the folding, processing, and transportation of newly synthesized proteins. Rough ER, studded with ribosomes, primarily synthesizes proteins destined for secretion or insertion into membranes, while smooth ER is involved in lipid synthesis and detoxification.