| A | B |
| spleen/o | spleen |
| lymphaden/o | lymph node |
| thym/o | thymus |
| phagocytes | microphages, macrophages |
| perforins | protein NK cells use to destroy foreign cells |
| thymosin | secretion by the thymus gland |
| autoimmunity | immune to oneself |
| tonsillitis | inflammation of the tonsil |
| antibody | molecule generated in specific opposition to an antigen |
| immunology | medical specialty dealing with the immune system |
| tonsillotomy | incision of a tonsil |
| ELISA | enzyme linked immunosorbent assay |
| Immune system | enables the human body to ward off many kinds of insults |
| T cells | make up about 80% of total number of lymphocytes |