text: where are lymphocytes produced and what are the different types of lymphocytes?   lymphocytes are produced in the bone marrow. there are 3 different types:  natural killer cells (nk) they attack and lyse host cells(cells that are in your own body) that have either turn cancerous or are infected by a virus or bacteria.  t cells are involved in nonspecific defense, humoral immunity and cellular immunity  b-cells fuction as an antigen-presenting cell