||Carries blood throughout the body
||Strain of bacteria that can enter the human system through contaminated water or food.
||A type of white blood cell that eats bacteria.
||Fast moving immune cells and are the front soldiers of the immune system. They kill bacteria before dying from exertion.
||T cells and B cells are the commando units of the immune system. They can defeat invaders that leave macrophages and neutrophils confused and helpless. But each is programmed to go after only a specific type of invasion.