Final answer:
Neutrophils are considered the body's best killing machines due to their prompt response to infection, exceptional phagocytic ability, and production of cytokines aiding in pathogen destruction and removal.
Step-by-step explanation:
Neutrophils are the body's best killing machines because they are highly efficient at phagocytizing pathogens, making them the first responders to infection.
They contain granules loaded with potent antimicrobial substances, like lysozyme, oxidants such as hydrogen peroxide, and defensins, which can lyse bacterial and fungal plasma membranes, causing the pathogens to die and ensuring their removal from the body.
In addition to being on the frontline of the innate immune response, their ability to produce cytokines helps in coordinating with other cells of the immune system, including involvement in the adaptive immune response.