Lysozyme plays a crucial role in the body's immune defense. It is an enzyme that catalyzes the breakdown of peptidoglycan, a component of bacterial cell walls, leading to bacterial lysis and death. Lysozyme is present in various body fluids, including saliva, tears, and mucus, where it protects against infections. By efficiently targeting and destroying pathogens, lysozyme contributes to maintaining homeostasis and the body's overall health.