| A | B |
|---|
| thymus | lymphatic organ most active during childhood |
| skin | first line of defense |
| Peyer's Patches | prevents bacteria from breaching the intestinal wall |
| natural killer cells | innate, indiscriminate lymphocytes |
| pathogens | disease-causing organisms |
| spleen | destroys old red blood cells and filters blood |
| phagocytes | devour bacteria and parasites |
| monocytes | divide into macrophages and dendritic cells |
| eosinophils | phagocytic to parasites, mostly worms |
| mast cells/ basophils | release histamines during an allergic reaction |
 | monocyte |
 | lymphocyte |
| neutrophils | most abundant leukocyte |
| T-cells | become immunocompetent in thymus gland |
| spleen | removes aged and defective RBC's |
| edema | results from accumulation of fluid leaked into the bloodstream |
| macrophages | phagocytic offspring of monocytes |
| neutrophils | first phagocytes to migrate into an injured area |
| tonsils | lymph nodes in the phayngeal area |
| inguinal nodes | small masses of lymphoid tissue in the groin area |
| axillary nodes | small masses of lymphoid tissue in the arm pit area |
| kinins | chemical messengers of the immune system |
| hydrochloric acid | chemical in the stomach |
| pyrogens | secreted by WBC's to induce fever |
| interferon | stimulates WBS's response to viruses and helps cells be resistant to viruses |
| abscess | sac of pus walled off by collagen fibers |
| helper T-cells | trigger cytotoxic T-cells |
| neutrophil |  |
| basophil |  |
| lymphocyte |  |
| eosinophil |  |
| macrophage |  |
| dendritic cell |  |
| interleukins | trigger fever and muscle pain |
| interferon | prevents viruses from attaching to cell |
| naturally acquired active immunity | contracting and recovering from a disease |
| artificially acquired active immunity | vaccinations |
| inactivated vaccine | pathogen is "killed" |
| attenuated vaccine | pathogen is less virulent |
| anaphylaxis | serious allergic reaction |
| edema | swelling of body tissues |
| pathogens | disease causing agents |
