Phagocytosis is the process by which a cell "eats" and engulfs large particles like pathogens and cell debris. This essential cellular process involves the recognition and attachment of a particle, its ingestion into a vacuole called a phagosome, and the maturation of the phagosome into a phagolysosome for intracellular digestion. Key functions include clearing foreign invaders, removing dead cells, and maintaining tissue homeostasis.  

Functions of phagocytosis

• Immune defense: Engulfs and destroys pathogens like bacteria and viruses to protect the body. 

Tissue maintenance:

Removes dead or dying cells and other cellular debris to maintain tissue health and homeostasis. 

Nutrition:

In unicellular organisms like amoebas, it can be a means of acquiring food.