The organelle in an animal cell that contains chemicals to break down food particles and worn-out cell parts is called the lysosome.

Here's why:

* Lysosomes are like the recycling centers of the cell. They contain powerful digestive enzymes that can break down a variety of materials, including:

* Food particles: Lysosomes fuse with food vacuoles, releasing enzymes that digest the food into smaller molecules that the cell can use.

* Worn-out cell parts: As organelles age or become damaged, they are engulfed by lysosomes and broken down, allowing their components to be recycled.

* Bacteria and viruses: Lysosomes can also help defend the cell by engulfing and destroying invading pathogens.

Let me know if you'd like to learn more about lysosomes!