Explain the difference between cell mediated and humoral immunity

Immune system is divided into two classes: cell-mediated immunity and humoral (or antibody-mediatd) immunity.
 
Humoral immunity is so named because it is associated with macromolecules that are dissolved in bodily fluids (also known as humor). Humoral immunity involves B-cells (or B lymphocytes) produced in our bone marrow. In the case of humoral immunity, the antigen (present in our body) is bound to B-lymphocytes (with the help of B cell receptors). In humoral immunity, antibodies (specific to the antigen) are produced by the plasma cells. The B-cells used in humoral immunity produce memory cells, that enable future immunity against the same antigen.

Cell-mediated immunity involves T-cells, which are a type of lymphocytes (type of white blood cells found in our blood). In the case of cell-mediated immunity, the cells containing antigen are identified and attached to T-lymphocytes (with the help of T-cell receptors). In cell-mediated immunity, cells containing the antigens are destroyed by cytotoxic T-cells.