Endoplasmic Reticulum

Rough ER

Smooth ER

Function
- internal membrane of cell in which lipid components of the cell membrane and some proteins are modified

Structure
- the structure of the ER depends on what kind it is

Function
- synthesis, modification and package proteins

Structure
- the ribosomes are attached to the membrane of the ER

Function
- is a storage organelle and is involved in the creation of steroids, lipids and carbohydrates for membranes

Structure
- part of the ER where no ribosomes are attached