So what is the Immune System? To answer that question in basic terms, it is your bodies natural defense mechanism. It protects your body from bacteria/disease/viruses which you may encounter on a day to day basis. Your body has two different ways it achives protection :

1. Innate Defensive System - This is your bodies way of non-specifically attacking foreign entities within itself. Some examples of nonspecific defenses include Inflammation, Fevers, Interferon & Complement Proteins. Each of these examples nonspecifically defend your body.

2. Adaptive Defensive System - Your body is also capable of defending itself in a more specific manner. It does so by supplying your body with such things as Antibodies and different forms of T-Cells.