Now, we know the innate immune system begins to act immediately following infection but our adaptive immune system actually takes several days before it is actually fully active and fully functional. Now, unlike the innate immune system which uses nonspecific mechanisms the adaptive immune system actually uses specific defense mechanisms because it uses antigens and antibodies as we'll see in just a moment. Now, the innate immune system cannot actually learn from infections but as we'll see in just a moment the adaptive immune system can actually learn from the different types of infections and pathogens that infect the body. 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.