The document describes the basic structure and function of cells. It defines cells as the smallest units capable of performing life functions and notes that all living things are made up of cells. The document outlines the key differences between prokaryotic and eukaryotic cells, and provides diagrams of a typical animal cell and plant cell. It then details the major organelles found within cells and their functions, including the nucleus, cytoplasm, cell membrane, cell wall, mitochondria, endoplasmic reticulum, Golgi bodies, lysosomes, vacuoles, and chloroplasts.