Golgi bodies are membrane-bound organelles found in eukaryotic cells that serve as the centers of cellular secretion and processing. They modify, package, and transport proteins and lipids and are made up of stacks of flattened sacs called cisternae. Golgi bodies were first discovered and described in 1898 by Camillo Golgi, who observed them in neurons and termed them the "internal reticular apparatus." They play an important role in synthesizing and packaging molecules for export from the cell.