This document discusses the main organelles found in cells and what they do. It describes ribosomes as the protein factory, the endoplasmic reticulum where ribosomes attach and synthesize proteins, the Golgi apparatus which packages proteins and carbohydrates, lysosomes which break down waste, peroxisomes which detoxify harmful substances, mitochondria which generate energy, and the nucleus which houses the genetic material. It also mentions the cytoskeleton which provides structure and the plasma membrane which forms the boundary of the cell.