Leukocytes engulf and kill pathogens such as bacteria, fungi, and viruses, and worn-out and cancerous body cells.

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Leukocytes, or white blood cells, are part of the immune system and function to protect the body against infectious disease and foreign invaders by engulfing and destroying pathogens, as well as removing worn-out cells and potentially cancerous cells through processes such as phagocytosis.

Leukocytes Engulf and Kill Pathogens Such as Bacteria, Fungi, and Viruses