Final answer:
The size of each cisternae within the Golgi apparatus is typically around 100 nm. This organelle resembles a stack of semicircular, flattened pancakes and is essential for processing and packaging proteins and lipids for transportation within the cell.
Step-by-step explanation:
The Golgi apparatus is a critical organelle within eukaryotic cells, involved in the processing and packaging of proteins and lipids. It is made up of a series of stacked membranes known as cisternae, which are typically about 100 nm in thickness. The Golgi apparatus looks like a stack of semicircular, flattened pancakes or rings, and it operates similarly to a post office by sorting, tagging, and directing substances to their proper destination within the cell. Also known for its role in the production of cell membranes, the Golgi develops vesicles that transport molecules, such as proteins and lipids, to various parts of the cell. Cells with high secretory activity have an abundant number of Golgi apparatuses, highlighting its essential role in cellular functions.