The protozoan organelle responsible for digestion is the food vacuole.

Here's how it works:

* Ingestion: Protozoans take in food through various mechanisms like phagocytosis (engulfing solid particles) or pinocytosis (taking in liquids).

* Food Vacuole Formation: Once the food is inside the protozoan, a membrane surrounds it, creating a food vacuole.

* Digestion: Enzymes within the food vacuole break down the food into smaller molecules that the protozoan can absorb.

* Waste Removal: Once digestion is complete, the remaining waste products are expelled from the cell through the process of exocytosis.

Let me know if you have any other questions about protozoans!