Innate Immunity vs Adaptive Immunity
Differences between Innate (Native) Immunity and Adaptive (Acquired) Immunity
The main function of immune system in our body is to prevent or resist infections by pathogenic microorganisms. The immune system in an organism is initiated with the recognition of the invading microorganism. The immunity against the invading microbes shown by our body can be grouped into two broad categories – (1) Innate Immunity and (2) Adaptive Immunity. These two immune systems act together to defend the body against infections and diseases.
(1). Innate Immunity: It is also called the Native Immunity. Innate immunity is the nonspecific resistance that an individual possesses by birth. This immune system operates through physical barriers such as skin, chemical in the blood and by immune cells. The innate immunity is due to the genetic makeup of the organism and it does not require the prior contact with microorganisms. The innate immunity acts as the very first level of defense system in our body.
(2). Adaptive Immunity: It is also called as Acquired Immunity or Antigen Specific Immunity. It is the specific resistance acquired by an individual during its life and it is mediated by B- and T- lymphocytes after exposure to specific antigen. The adaptive immune system is characterized by the formation of antibodies (immunoglobulins) and immunological memory.