eukrüootsetes rakkudes olev labürinditaoline struktuur, mis on tsütoplasmast eraldatud ühekihilise membraaniga, The endoplasmic reticulum (ER) is a type of organelle in eukaryotic cells that forms an interconnected network of flattened, membrane-enclosed sacs. There are two types of endoplasmic reticulum: rough