The endoplasmic reticulum is a membrane-bound cell organelle that is made up of a complex network of tubes and is located in the cytoplasm of the eukaryotic cell.
The endoplasmic reticulum is divided into two types namely, rough endoplasmic reticulum and smooth endoplasmic reticulum.
The smooth endoplasmic reticulum (SER) is a tubular structure that does not consist of ribosomes.
The absence of ribosomes in the smooth endoplasmic reticulum makes it smooth.
The function of the smooth endoplasmic reticulum is the transportation of products secreted by the rough endoplasmic reticulum to other cell organelles.