The endoplasmic reticulum is shortly abbreviated as ER. It is a type of organelle in eukaryotic cells.
The structure of ER is composed of the interconnected network of flattened and membrane-enclosed sacs or tube-like structures. These structures are known as cisternae.
There are two regions of the ER. Smooth ER and rough ER are classified on the basis of absence and presence of ribosomes on the surface of the ER respectively.
A cell is derived as the functional and structural unit of life. Every cell is surrounded by a cell membrane that dissects the external and internal environments of the cell. The interior environment of a cell is called the cytoplasm.
It carries cellular machinery and structural elements. The nucleus is present in the center of the cell, which includes all the hereditary information of an organism. Some of the molecules present in the cell are protein, carbohydrates, starch, and sugar.