They are highly dense near to the nuclear membrane. RER has a number of flattened tubules that are joined with each other. This is the reason why they are called Rough ER.ĭue to the presence of small granular ribosomes that are present on the surface of ER they are termed as Rough ER.
It bears a number of Ribosomes on itself. It is found in close proximity to the nuclear membrane. On the basis of appearance and function, Endoplasmic Reticulum is of two types-ĭifference Between SER and RER is as Follows The network formed by it is highly complex. All the membranes of the ER form a network and are interconnected with each other.Įndoplasmic Reticulum is a single membraned organelle and is also a part of the Endomembrane system of the cell. Its discovery was made possible due to the invention of the electron microscope.Įndoplasmic Reticulum is a tubular, membraneous cell organelle seen in continuity with the nuclear membrane of the nucleus in the cell.
The word 'reticulum' in ER means ‘network’ and this word was added in its name by Porter. It performs a variety of functions in a cell and has two parts as Rough endoplasmic reticulum and Smooth endoplasmic reticulum.ĮR was discovered by Keith Porter and Claude. The Endoplasmic Reticulum is one such cell organelle found in every Eukaryotic cell excluding some exceptions like RBCs. The former cell has a number of cell organelles present in it whereas the latter lacks these cell organelles. The major difference between these two types of cells in the presence of cell organelles. Cells are categorized into two types- Eukaryotic cell and Prokaryotic cell. All living organisms found on earth are made up of cells.
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