Well, nonspecific implies that the innate immune system does not actually depend on the presence of any specific antigen like the acquired immune system does. And what that means is the innate immune system will attack all the different types of pathogens without actually considering what type of antigen is found on those pathogens. That is, it attacks all the pathogens with equal likelihood. Now let's discuss some of the different types of physical anatomical barriers that exist inside our body that are part of the innate immune system and which basically function not to only prevent the physical movement of these pathogens into. Our body, but to also create an inhospitable environment to prevent the growth of different type of pathogens on our body and in our body. So let's begin with our skin.