Читать книгу Understanding Anatomy and Physiology in Nursing - John Knight - Страница 34

This is the form of endocytosis by which cells can take up solid particulate materials. The term phagocytosis literally means ‘cell eating’ and is particularly important in the cells of the immune system which are actively engaged in removing pathogenic material such as bacteria, fungal cells and viral particles. The process of phagocytosis utilises the fluid nature of the plasma membrane. When a pathogen such as a bacterium is encountered the plasma membrane flows around it, engulfing it and enclosing it in a membrane-bound vesicle. Once internalised within the cytoplasm, the lysosomes produced by the Golgi fuse with the vesicle and discharge their enzymes into its interior, killing the pathogen and initiating intracellular digestion.