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Immune System
| Question | Answer |
|---|---|
| Histamine | Causes capillaries to dilate |
| Immunity | Resistance to pathogens |
| Inflammatory reaction | A response to pathogens that causes redness and swollen skin |
| Lymph | Fluid that is in lymphatic vessels |
| Lymphatic vessel | Vessel that carries lymph |
| Lymph node | Mass of lymphatic tissue |
| Macrophage | Large monocyte |
| Natural killer cells | Kills infected cells |
| Pus | Dead white blood cells and bacteria |
| Red bone marrow | Produces blood cells |
| Spleen | An organ in the abdomen that stores and purifies blood |
| Tonsils | Lymph nodule in the pharynx |