Cellular digestion is the process by which cells break down nutrients to obtain energy and essential building blocks. This occurs primarily in the lysosomes, which contain enzymes that digest macromolecules like proteins, lipids, and carbohydrates. The resulting smaller molecules are then used for energy production or to synthesize new cellular components. In addition to lysosomes, cellular digestion can also occur through autophagy, where cells recycle their own components. This process helps maintain cellular health by removing damaged organelles and proteins. Overall, cellular digestion is crucial for maintaining the cell's metabolism and supporting its functions.