Final answer:
Neutrophils perform the major function of phagocytosis by engulfing and digesting pathogens. They are the first responders to infection and produce cytokines that aid in pathogen destruction and removal from the body.
Step-by-step explanation:
The major function of neutrophils is phagocytosis, which means they engulf and digest pathogens. Neutrophils are the first responders to infection and produce cytokines that cause pathogen destruction and removal from the body.