Smooth Endoplasmic Reticulum and Rough Endoplasmic Reticulum.
Smooth ER is a storage method of the cell and it synthesizes lipids. Rough ER processes and packages proteins.
Ribosomes are found in rough ER while they are not found in smooth ER. These are what give the "rough" appearance.
It means that in a comparison of two or more things, one is "smoother" and the other "rougher". Generally speaking to the texture of something. You could describe concrete as being rough, and a...
Rough ER- has ribosomes on it that produce proteins Smooth ER- produces lipids (fats, waxes, etc.)