This document provides information on the key organelles and structures found in animal cells, including their functions: Centrioles help organize cell division. Cilia and flagella help move materials and fluids past cells. The endoplasmic reticulum and Golgi bodies are involved in transporting and processing chemical compounds. Mitochondria produce energy and lysosomes digest waste. The nucleus contains DNA and directs the cell. Ribosomes process proteins while the cell membrane protects the cell.