This is a process in which foreign bodies such as bacteria are engulfed and destroyed. An example of a phagocytic cell would be a macrophage. These macrophages are able to engulf foreign bodies, they do this in order to protect the body from infection.

The cytoplasm of Phagocytes are rich in lysosomes (covered in Protein synthesis and DNA), the bacteria are then destroyed and absorbed by the phagocyte. 

Below is a diagram of Phagocytosis: