Cisterna

A cisterna (plural: cisternae) is any membrane-bound sac. They can be found in the Golgi apparatus and in the endoplasmic reticulum.  It is the flattened sac on the branch of the endoplasmic reticulum and the curved sac on the branch of the Golgi apparatus.

 Position in cells 
2 Nuclear pore
3 Rough endoplasmic reticulum (RER)
4 Smooth endoplasmic reticulum (SER)
5 Ribosome on the rough ER
6 Proteins that are transported
7 Transport vesicle
8 Golgi apparatus
9 Cis face of the Golgi apparatus
10 Trans face of the Golgi apparatus
11 Cisternae of the Golgi apparatus

Cisternae are on the trans face of the Golgi apparatus. They are in the cytoplasm next to the endoplasmic reticulum and near the cell nucleus.

Roles
The cisternae play an important role in the packaging, modification, and transport in the cell. They help the transport of proteins and other enzymes from the Golgi. Cisternae transport proteins in the endoplasmic reticulum to the vesicles of the Golgi apparatus.

References

Category:Cell biology