We just learned about the kind of white blood cell called a lymphocyte, and the kind of lymphocyte called the B Cell.
There are other kinds of white blood cells, like one called the Monocyte.
These white blood cells are bigger than their cousins the lymphocytes, and their job is to go around cleaning up dirty things like infections in the body.
When they see something like dirt or infection they turn into something else called a macrophage and they wrap themselves around the bad stuff, almost like they are eating it, and they destroy the unhealthy bad stuff.
They are different from the lymphocytes because lymphocytes are really for targeting specific diseases or viruses, and monocytes are really more like cleaning up all the dirty garbage and fighting off infections.
So if your skin gets cut and you don't wash it off and keep it clean, you can get dirt and germs in your body.
The monocytes help fight off the bad stuff that comes from the dirt and germs if it gets infected.
(from: wikipedia - monocyte)
Kid Facts - Blast from the past: Choroid
