Lysosomes: - Common in animal cells. - Helps cell digest proteins. - Cleanup crew of the cell. - Contain powerful chemicals that digest nutrient molecules in the cell. - When other organelles stop working, the lysosomes break down and recycle the old cell parts so they can be used again. - The chemicals in the lysosomes only break down unhealthy cell parts. - ------ Membrane surrounds the lysosomes to stop them from destroying the rest of the cell