The endoplasmic reticulum is a network of membranes found inside cells. It’s like a sort of cellular transportation and communication system.
It comes in two forms: the rough endoplasmic reticulum, which is studded with ribosomes and is involved in protein synthesis, and the smooth endoplasmic reticulum, which lacks ribosomes and is involved in lipid synthesis and cellular detoxification.
The endoplasmic reticulum is fundamental for the functioning and organization of the cell, allowing the production and distribution of molecules necessary for its proper functioning.