Apart from the skin as a protective covering, our body has a number of other defense mechanisms. The white blood cells and the lymphatic system play and important role in warding off diseases. some important lymph nodes are the tonsils and the spleen. Here, the white blood cells are taught which substances belong to the body and which do not. If foreign substances come inside the body, the macrophages or the killer cells start tracking and destroying them. Fever accelerates this process. However, if the fever rises above 42'C, the proteins in the body clump together, get destroyed, and may cause death, If the body's defense mechanism alone is not able to get rid of the diseases, we can take medicines to assist it.
