The structure within an animal cell that recycles worn-out parts is the lysosome.

Here's why:

* Lysosomes are membrane-bound organelles that contain powerful digestive enzymes. These enzymes break down various cellular components, including:

* Worn-out organelles (like mitochondria or the endoplasmic reticulum)

* Debris from the cell's own internal processes

* Engulfed material from outside the cell (like bacteria)

Think of lysosomes as the cell's "recycling center" or "garbage disposal." They break down unwanted material and release the building blocks for reuse.