During phagocytosis, pathogens are engulfed by white blood cells that ingest foreign particles.
- In addition to being present in practically every type of cell in multicellular species, phagocytosis is a fundamental function for nourishment in unicellular creatures.
- But only a specific class of cells known as professional phagocytes are highly effective at phagocytosis. These specialized cells include osteoclasts, neutrophils, monocytes, dendritic cells, and macrophages.
- Professional phagocytes are in charge of clearing pathogens from the environment and presenting antigens to lymphocytes to trigger an adaptive immune response.
- Fibroblasts, epithelial cells, and endothelial cells are referred to as non-professional phagocytes since they are only capable of performing phagocytosis with poor efficiency.
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