What organelle contributes to phagocytosis in white blood cells?

The endoplasmic reticulum (ER) is primarily involved in the synthesis of proteins and lipids, as well as the processing of newly synthesized proteins. While the ER is essential for cellular function, it does not directly participate in phagocytosis or the breakdown of ingested materials, making it irrelevant to this process.

Vacuoles are membrane-bound sacs within cells that serve various roles, including storage and transport of substances. While they can hold materials and waste, they are not specifically involved in the enzymatic breakdown of pathogens during phagocytosis, differentiating their function from that of lysosomes.

The Golgi apparatus is responsible for modifying, sorting, and packaging proteins and lipids for secretion or delivery to other organelles. Though it plays a key role in cellular processing and trafficking, it does not participate directly in the process of phagocytosis, where the digestion of engulfed materials occurs.