Definition

Noun: * The process by which certain living cells, called phagocytes, ingest or engulf other cells, microorganisms, or foreign particles. This is a vital mechanism for the immune system to destroy pathogens and clear away dead or damaged cells.

Usage

• As a subject of a sentence: "Phagocytosis is a crucial part of the innate immune response."
• As an object of a verb: "Macrophages carry out phagocytosis to remove bacteria from the tissue."
• With a prepositional phrase: "The efficiency of phagocytosis can be enhanced by antibodies."

Examples

• "During an infection, neutrophils arrive at the site and begin the process of phagocytosis."
• "The study focused on how the cell membrane changes during phagocytosis."
• "A failure in phagocytosis can lead to persistent infections."

Advanced Usage

• Professional/Medical Context: The term is used precisely to describe a specific cellular mechanism. It is often discussed in relation to opsonization (the coating of a pathogen to make phagocytosis more efficient) and intracellular digestion.
  • Example: "The researchers observed the complete phagocytosis pathway, from receptor binding to lysosomal degradation."

Variants and Related Words

• Phagocyte (noun): A type of cell (e.g., macrophage, neutrophil) that performs phagocytosis.
• Phagocytose (verb, less common): To engulf by phagocytosis. (e.g., "The macrophage will phagocytose the debris.")
• Phagocytic (adjective): Relating to or characterized by phagocytosis. (e.g., "phagocytic activity")

Synonyms

• Cellular engulfment
• Cell eating (This is a descriptive, non-technical synonym. The technical biological term is "phagocytosis.")

Antonyms

• Exocytosis (The process by which a cell expels materials.)
• Phagocyte inhibition (The prevention of the phagocytosis process.)

Related Phrases / Concepts

• Immune defense: Phagocytosis is a primary component of this.
• Intracellular digestion: This is what happens to the engulfed material after phagocytosis.
• Opsonization: A process that marks pathogens for more efficient phagocytosis.

Noun

1. process in which phagocytes engulf and digest microorganisms and cellular debris; an important defense against infection