Phagocytosis: Is a physiological cellular process wherein a

Phagocytosis is a physiological cellular process wherein a cell engulfs a particle having a diameter >0.5 µm. In multicellular organisms’ immune cells exhibit phagocytosis . Learn more and take the quiz! Phagocytosis , often called 'cell eating', is a fundamental biological process where a cell actively engulfs large particles, such as bacteria, viruses, or dead cellular debris. The cell extends its membrane to surround the particle, forming an internal vesicle called a phagosome. This is a crucial mechanism for both nutrition in single-celled organisms and for immune defence in multicellular organisms. Phagocytosis Definition, Steps, and Example. What is phagocytosis ? How does phagocytosis occur? Steps in the phagocytosis of a bacterium Learn how phagocytic cells ingest and kill invading pathogens or dead/dying cells by phagocytosis , a type of endocytosis. Explore the receptors, mechanisms, and products involved in this innate defense mechanism.