Macrophages are a type of phagocyte. They have a whole range of powerful enzymes and toxic substances that can digest the bacteria. Neutrophil Neutrophils are attracted to war zones by various chemotactic agents . These include certain features on the surface of bacteria and products of other WBC's already at the scene. Neutrophils are the main line of defence against rapidly dividing bacteria that could divide into fatal numbers if ignored.
Neutrophils are also phagocytes and have a similar range of enzymes and toxic substances.
A special type of phagocyte that can attack the larger parasites. They can't actually engulf them, but instead release their ammunition onto the surface of the parasite. Lots and lots of the enzymes and toxic substances that the other phagocytes have. These are the cells responsible for the redness, heat and swelling associated with insect bites etc. This is called inflammation.