Phagocytosis Overview and Function

Phagocytosis Overview

• Phagocytosis, meaning "cell eating," is a cellular process where cells engulf large particles or solids.
• The process begins with the cell membrane forming pseudopodia (false feet).
• These pseudopodia surround and enclose the particle.
• The enclosed material is then packaged into a membrane-bound vesicle called a phagosome.
• The phagosome fuses with lysosomes.

Lysosomes and Digestion

• Lysosomes contain digestive enzymes.
• The enzymes within lysosomes break down the ingested material.

Phagocytosis in Single-celled Organisms

• Some single-celled organisms use phagocytosis to ingest food.

Phagocytosis in Multicellular Organisms

• Multicellular organisms also utilize phagocytosis in specialized cells.
• White blood cells exhibit phagocytosis to engulf and destroy invading bacteria, viruses, or damaged cells, contributing to the body's defense.
• The process also removes cellular debris.