Golgi Apparatus
. Golgi Apparatus, also Golgi body or Golgi complex, network of stacked sacs found within nucleated cells that store, package, and distribute the proteins and lipids made in the endoplasmic reticulum . The Golgi apparatus was first described by Italian anatomist Camillo Golgi in the late 19th century. Located near the nucleus, each apparatus consists of a stack of six or seven flattened, membrane-bound sacs, or cisternae, each separated by a narrow space. The Golgi apparatus is cup-shaped with the convex end, or cis cisterna, facing the cell nucleus and the concave end, or trans cisterna, facing the cell surface. The number of Golgi apparatus in each cell varies but averages between 10 and 20 in animal cells and up to several hundred in plant cells. Proteins and lipids manufactured in the endoplasmic reticulum bud off in tiny, hollow structures, or vesicles, and fuse with the cis cisterna of the Golgi apparatus. The proteins and lipids move progressively through the stack of cisternae...