And so our immune system can initiate a series of internal defense mechanisms that ultimately destroy our foreign object, our bacterial cell. Now, if we take our immune system, the immune system can basically be divided into two types. The first type is known as the nonspecific, or the innate immune system. And the second division is known as the specific, or the acquired immune system. So, if we look at our immune system, it could be subdivided into two categories. We have the Innate Immunity, also known as non specific Immunity, and we have the Quiet Immunity, also known as the specific Immunity.