Endoplasmic reticulum is a network of tubules, vesicles and sacs that are interconnected.
They may serve specialized functions in the cell including protein synthesis, sequestration of calcium, production of steroids, storage and production of glycogen, and insertion of membrane proteins. The first part of this presentation will focus on rough endoplasmic reticulum which gets its name from the presence of ribosomes on its surface. All of the figures in these web pages are linked to a page listing the citation from which the figure was taken. Click on the figure to learn the citation. If there is no link, the figure came from our own collection Rough endoplasmic reticulum bears the ribosomes during protein synthesis.