Golgi apparatus "post office"
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The Golgi apparatus, or body, is the organelle that ships proteins and lipids out of the cell, like a post office. It's found in most eukaryotic cells. It's composed of cisternae, which is like a flat membrane-bound sac. The Golgi is often seen working with the Rough ER. When a protein is made there, a vesicle carries it from the Rough ER to the Golgi, where it travels through and gets ready to be sent out. In a vesicle, the Golgi ships it out into the cytoplasm again.
Rough er, Smooth er "FACTORY"
The Endoplasmic Reticulum are found in both animal and plant cells. Together, the Rough and Smooth ER make up one organelle called the Endoplasmic Reticulum, the "factory" because they create important molecules for the cell.
The Rough ER also is composed of cisternae and is attached to the nuclear envelope. It is "rough" because it is studded all over with ribosomes. The Rough ER aids in the synthesis of proteins. The ribosome creates the protein, then it travels through the ER and a vesicle is created around it. The Rough ER also aids in the folding of proteins The Smooth ER is not covered in ribosomes like the Rough ER. It's in charge of making and storing lipids in the cell. It can also make organic chemicals safe for the cell. |