Is the process of white blood cells engulfing and terminating pathogens.

phagocytosis

Explanation:

Some substances enter the cell via active and passive transport, others, however, are not able to use this transport route. In such cases, they may be encompassed by the cell in a process known as endocytosis.

One type of endocytosis is called phagocytosis. In this process, the cell captures a relatively large solid particle through cytoplasmic extensions called pseudopods. The particle is then encompassed and becomes part of the cytoplasm of the cell. At this stage, the ingested material is completely surrounded by a membrane, forming the so-called phagosome.

Phagocytosis is the process of white blood cells swallowing and terminating pathogens, for example.