The innate immune system is nonspecific. It attacks everything that is pathogenic, it creates immediate response and it also is the primary line of defense. Now, unlike the adaptive immune system, which we'll talk about in next lecture, the innate immune system does not actually learn. So that means there are no memory immune cells that exist within our innate immune system and we'll talk more about memory cells in the next lecture. Now, the last thing I'd like to mention is the following. So we see that once the pathogen invades our tissue, the basic fields and mass cells secrete the histamine and other chemicals that ultimately make the capillaries more permeable to water more leaky.