endoplasmic reticulum

The endoplasmic reticulum (ER) is a vital cellular structure found in eukaryotic cells, resembling a network of membranes within the cell. It plays key roles in the synthesis of proteins and lipids (fats) essential for cell function and structure. The ER is divided into two types: the rough ER, which is studded with ribosomes that produce proteins, and the smooth ER, which helps in lipid production and detoxification processes. Overall, the ER is crucial for processing and transporting materials inside the cell, contributing to its overall health and functionality.