Other forms: endoplasmic reticula; endoplasmic reticulums
The endoplasmic reticulum is the part of a cell that makes and transports proteins and fats. A system of membranes, the endoplasmic reticulum acts as a cell's transportation center.
In biology, reticulum is used for net-like structures or networks, from the Latin meaning, "a little net." Endoplasmic was coined in the late 1940s, using the Greek roots endon, "within," and plasma, "something molded." Earlier, scientists observing this organelle through electron microscopy called it "a lace-like reticulum." The endoplasmic reticulum's network of membranes create vital substances that cells need and delivers them where they need to be.