What organelle breaks down worn-out cell parts?

The organelle responsible for breaking down worn-out cell parts is the lysosome. Lysosomes contain digestive enzymes that break down various biomolecules, such as proteins, lipids, and carbohydrates, into their basic components. These enzymes help in recycling cellular materials and maintaining cellular homeostasis by degrading and removing damaged or unnecessary organelles and molecules. The process of breaking down and recycling cellular components is known as autophagy.