The document describes organelles found in plant and animal cells and provides analogies to compare their functions to parts of a school. It discusses the nucleus, which controls the cell like a principal, and mitochondria and chloroplasts, which produce energy like a cafeteria. It also mentions the endoplasmic reticulum, which transports proteins like hallways; the Golgi apparatus, which packages proteins like office secretaries; and lysosomes, which break down waste like custodians.