The main function of the immune system is to provide <em><u>IMMUNITY</u></em> to the body, which is defined as the body’s ability to protect itself from pathogens it is exposed to.
In general, your body fights disease by keeping things out of your body that are foreign. Your primary defense against pathogenic germs are physical barriers like your skin. You also produce pathogen-destroying chemicals, like lysozyme, found on parts of your body without skin, including your tears and mucus membranes.
