The Endoplasmic Reticulum
The endoplasmic reticulum is a network of sacs and tubules that strech far and wide throughout the cytoplasm in plant and animal cells. The internal space inside the ER is reffered to as the lumen or the cisternal space. The ER is made up of two parts the Smooth ER and the Rough ER the fuctions of each will be explained shortly. The Endoplasmic reticulum contains material (e.g. proteins) that are produced for outside cell use or for later cell use. Basically the ER is a transportational pathway for substances within a cell.
Smooth ER- no attached ribosomes
-Synthesis of Phosphlipids, Cholesterol and Steroids
-Detoxification of drugs and poisons(in liver)
-Stores and releases calcium
Rough ER- ribosomes attached onto membrane
This feature is not yet available at the tullarmarine aairport, however in the changi airport in Singapore Sky Trains are used to transport people to different parts of the airport. "Basically the ER is a transportational pathway for substances within a cell" Just as the ER's main fuction is the direct transport of substances around the cell the sky train directly transports people to certain parts of the airport.