Phagocytosis

Definition

The process by which a cell engulfs and internalizes solid particles, such as bacteria or cellular debris.

Etymology

From Greek 'phagein' meaning to eat and 'kytos' meaning vessel.

Example

Phagocytosis is a crucial part of the immune system's defense against infection.

Related Terms

• Immune response
• Immune cells
• Ingestion

Usage Notes

Phagocytosis can be triggered by various stimuli, including pathogen-associated molecular patterns (PAMPs) and opsonins. The process often involves the formation of a phagosome, which fuses with lysosomes to kill and digest the ingested material.