What type of cells are known for digesting foreign particles?

Phagocytes are specialized cells that play a crucial role in the immune system by engulfing and digesting foreign particles, such as bacteria, viruses, and cellular debris. This process is known as phagocytosis, where the phagocyte surrounds the foreign particle and takes it into a compartment called a phagosome. The phagosome then fuses with lysosomes, which contain enzymes that break down the foreign material.

Neutrophils are actually a type of phagocyte and are among the first responders to sites of infection, effectively digesting and destroying pathogens. However, the broader category of phagocytes includes not only neutrophils but also macrophages and dendritic cells, expanding their role beyond just the actions of neutrophils.

Mast cells are involved in allergic reactions and the release of histamine, while B cells are a type of lymphocyte that primarily produce antibodies. Neither mast cells nor B cells actively digest foreign particles, which further emphasizes why phagocytes are the correct answer in this context. Their main function is the direct ingestion and breakdown of harmful agents, encapsulating their essential role in maintaining the body's defense mechanisms.