We have helper T cells, cytotoxic T cells, depressor T cells and memory T cells. So helper T cells are a very important type of lymphocyte because they assist many other cells with a differentiation process. Helper T cells help B lymphocytes differentiating the plasma cells and memory B cells and they also help tillyphasize themselves differentiate into cytotoxic T cells. So helper T cells assist with B and T cell differentiation and these also release their own cytokines and interlocutines different chemicals that essentially call upon cells like macrophages to that specific area. Now, cytotoxic T cells are like natural T cells because these basically attack infected cells, cells that have been infected by a viral agent or they can also attack cancer cells. But there is an important difference.