👉 Neutrophils are a type of white blood cell that play a crucial role in the immune system. They are found throughout the body, including in the lining of the digestive tract and in various tissues such as the skin, lungs, and heart. The primary function of neutrophils is to help fight off infections and other harmful substances by phagocytosing pathogens and releasing enzymes that destroy them. They can also play a role in regulating the immune response by producing cytokines and chemok