The organelles that enable white blood cells to ingest and destroy bacteria are lysosomes.

Here's how it works:

1. Phagocytosis: White blood cells (like macrophages and neutrophils) use a process called phagocytosis to engulf bacteria. The white blood cell's cell membrane surrounds the bacteria, forming a vesicle called a phagosome.

2. Lysosome Fusion: Lysosomes, which are small organelles containing powerful digestive enzymes, fuse with the phagosome.

3. Digestion: The enzymes within the lysosome break down the bacteria into harmless components.

So, lysosomes are crucial for the immune system's ability to fight infections.