Immunity.

When the immune system is fighting bacteria, the first defense put up is called Innate Immunity. The first step to innate immunity is the prevention of bacteria entering the system. When preventing the entry of bacteria your skin is dead, so when there is bacteria on your skin, it prevents anything from passing through. Another way of preventing the entry of bacteria is mucus. All of the openings on our bodies have mucus. For example, at the opening in your ear. In your ear, the mucus you have is called wax. Just like the other mucus in your body, it is kind of gooey and sticky, which is how it helps with defense. When pathogens gets near or have contact with your ear wax or other mucus, it traps the pathogens. The last way our body prevents he entry of disease or sickness is with bacteria. Inside our tracts, we have bacteria that destroy different pathogens. For example, in the digestive tract, we have a bacteria called salmionilla. When pathogens go through or enter the digestive tract, the salmionilla helps by destroying them, while on the other hand, if we ingest salmionilla and it enters the stomach, it can be very dangerous, and sometimes can even be fatal. The second half of Innate immunity is destroying pathogens if they get into our tissue or blood. The first thing our system uses to destroy the infecting pathogens are Neutrophilis, or white blood cells. When the pathogen enters the body, they sense it, and so they rush to the location of the pathogen then surrounding, engulfing (eating) and destroying them. The second part of the elimination are Macrophages, which enter the site of the pathogen and Neutophilis and start destroying hte pathogens. In addition, when there is infection, inflimation or swelling can occur. When this happens it is the trapped pathogens and the ones who are killing them.