Smooth ER is a membrane-bound tubular network that also contains vesicles. Structure of Smooth Endoplasmic Reticulum Gonadal cells, striated muscle cells, hepatocytes, and sebaceous glands have a high concentration of SER compared to others. SER is present in all eukaryotic cells and majorly involved in lipid synthesis. It is smooth in appearance because of the lack of ribosomes. Smooth ER is the tubular part of the endoplasmic reticulum.

The endoplasmic reticulum is of two types rough ER and smooth ER. Studies show that the ER makes up more than half of the cell’s membranous content. It plays a major role in the synthesis, folding, and modification of proteins. It is present in the cytoplasm alongside the plasma membrane. The endoplasmic reticulum is a sack-like organelle comprising flattened sacs.

With Membrane Plasmalemma Nuclear membrane Vesicles Oleosomes Lysosomes Ribophorins Absent Present Function Lipid synthesis, Ca 2+,Įnzyme synthesis What is the Endoplasmic Reticulum? The Bottom Line Comparison Table Characteristics Smooth ER Rough ER Definition Smooth part of ER Rough part of ER Ribosomes Absent Present Appearance Smooth Rough Origin Rough ER Nuclear membrane Location Near plasma membrane Near Golgi apparatus Structure Tubules and vesicles Cisternae Connection.Function of the Rough Endoplasmic Reticulum.Structure of Rough Endoplasmic Reticulum.Function of the Smooth Endoplasmic Reticulum.Structure of Smooth Endoplasmic Reticulum.

Rough er function