The Golgi apparatus is a cell organelle that plays a crucial role in processing and packaging proteins and lipids. It consists of a series of flattened, membrane-bound sacs called cisternae. The Golgi apparatus modifies proteins received from the endoplasmic reticulum and prepares them for transport to their final destinations, either inside or outside the cell. In addition to protein processing, the Golgi apparatus is involved in the synthesis of certain carbohydrates and the formation of lysosomes. It acts as a sorting center, ensuring that molecules are delivered to the correct location, which is essential for maintaining cellular function and organization.