The human body was designed to protect itself against harmful germs in order to stay alive. The most vital mechanism aiding that process would be the immune system. The human immune system is working non-stop, everyday, and every second. There are millions of germs, bacteria, microbes, viruses, toxins, and parasites that float around us day by day; and the fact that we are not affected by most of them is because our immune system keeps these microscopic particles from invading our bodies. However, sometimes the immune system may miss one of the harmful germs and the body becomes sick. Even though it was missed once, the immune system uses special white blood cells to attack harmful bacteria (Nordqvist, 2012, p. 1). The immune system always fights to get rid of …show more content…
When interleukins reach the hypothalamus, it produces fever and fatigue. The raised temperature of a fever is known to kill some bacteria. White blood cells are the most important part of the immune system. White blood cells are actually a whole collection of different cells that work together to destroy bacteria and viruses and they include: Leukocytes, Lymphocyte, Monocytes, Granulocytes, B-cells, Plasma cells, T-cells, Helper T-cells, Killer T-cells, Suppressor T-cells, Natural killer cells, Neutrophils, Eosinophil, Basophils, Phagocytes, and Macrophages. All white blood cells are known officially as leukocytes. White blood cells are not like normal cells in the body, they actually act like independent, living single-cell organisms able to move and capture things on their own. White blood cells behave very much like amoeba in their movements and are able to engulf other cells and bacteria. Many white blood cells cannot divide and reproduce on their own, but instead have a factory somewhere in the body that produces them. That factory is the bone