This document summarizes several key cell organelles: The cytoplasm contains organelles and allows cellular activities. Organelles include the cytosol, cytoskeleton, cilia, flagella, mitochondria, endoplasmic reticulum, lysosomes, peroxisomes, vacuoles, centrioles, and basal bodies. Mitochondria produce energy in the form of ATP and regulate the cell's metabolism. The endoplasmic reticulum packages and transports proteins while the lysosome contains enzymes to break down biomolecules.