Now, the adaptive immune system can be subdivided into two categories into two divisions. We have the antibody mediated immunity or the humoral immunity and we also have the cell mediated immunity. And these two systems work together to basically carry out that same exact function to fight off our pathogens that infected our body. So let's begin with the antibody mediated immunity. Now, the leukocytes involved the white blood cells involved in the antibody mediated immunity are the beetleympicides. Now, beet lymphocytes not only form in the bone marrow but they also mature in our bone marrow.