What is the large network of membranes called in which cellular lipids are synthesized?

The large network of membranes where cellular lipids are synthesized is called the endoplasmic reticulum (ER). The ER consists of a series of interconnected tubules and sacs, and it plays a crucial role in lipid metabolism, protein synthesis, and the detoxification of certain chemicals. The smooth endoplasmic reticulum, in particular, is primarily responsible for the synthesis of lipids.