Final answer:
Lysozymes in phagocytic granules are crucial for killing pathogens, as they break down bacterial cell walls when phagocytes engulf pathogens.
Step-by-step explanation:
The contents in phagocytic granules that help kill pathogens are lysozymes. Phagocytes, such as macrophages and neutrophils, contain these granules. Lysozymes are enzymes that break down the cell walls of bacteria, contributing to the destruction of the pathogens. When a phagocyte engulfs a pathogen, forming a phagosome, it then fuses with a lysosome. This process allows lysozymes and other digestive enzymes within the lysosome to attack and dismantle the pathogen, thus playing a critical role in the body's innate immune response.