The Golgi apparatus is a membrane-bound organelle found in most cells. It is responsible for packaging proteins into vesicles prior to secretion and therefore plays a key role in the secretory pathway. The Golgi is made of 5-8 folds called cisternae. The cisternae contain specific enzymes creating five functional regions which modify proteins. The Golgi apparatus modifies proteins and lipids that is receives from the endoplasmic reticulum. These biochemicals leave the Golgi by exocytosis before being delivered to different intracellular or extracellular targets.