Neutrophils are an important part of your immune system. They’re a type of white blood cell that kills and eats bacteria and fungi to help your body fight infections and heal wounds. There are ...

This story is part of a series exploring human anatomy and physiology complexities ... that the body's immune system—with its white blood cells and antibodies—plays a critical part in ...

removing microbes and worn out or damaged red blood cells. It is also an important organ in the immune system, producing the white blood cells that fight infection and synthesize antibodies.

This organ helps filter your blood, trapping old and damaged red blood cells. It also contains white blood cells, which are an important part of your immune system and help fight off infections.