Which body secretion helps to fight infections?

The body has several secretions that play important roles in fighting infections, and saliva is a significant component due to its antimicrobial properties. It contains enzymes like lysozyme that can break down bacterial cell walls, as well as antibodies that help neutralize pathogens. Sweat also contributes to this defense mechanism; its acidity can inhibit the growth of certain bacteria and fungi on the skin's surface. While digestive juices primarily function to break down food, they also contain strong acids and enzymes that can kill or inhibit many pathogens present in ingested food.

The presence of these different secretions demonstrates a multi-faceted approach to immunity, where each type contributes to the overall defense against infections in unique ways. This collective effort shows that all of the listed secretions work together in maintaining health and preventing the establishment of infections.