Innate and Adaptive Immune Responses on First and Subsequent Exposure to a Pathogen

The immune system is comprised of two responses: the adaptive immune response and the innate immune response. The first line of defence against invading organisms is classified as the innate immune response and the second line of defence and protection against re- exposure to the same pathogen is known as the adaptive immune response.

Innate immune responses are known as the non-specific manner which composes the cells and defend the host from infection by other organism by mechanism. The adaptive immunity represents the antigen-specific immune response. Compare to innate immune response, adaptive response is more complex. In adaptive response the antigen needs to be recognised and processed. The adaptive immune system creates immune cells specifically to attack the antigen when the antigen has been recognized and processed. Another function of adaptive immune system, they have a memory in which response future fight specific antigen.

Responses all have the one thing in common, they both protect against various pathogens or other foreign substances, however both responses defe...