What Are The First Two Categories Of Innate Defense

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The immune response is made up of first, second, and third line defenses. The first two defenses are considered innate responses. These responses are non-specific and typically in place at birth. The first line of defense against pathogens includes the skin and mucous membranes. If a pathogen makes it past these defenses the second and third line of defense step in. The second line of defense includes phagocytes, fever, natural killer cells, inflammation, and antimicrobial proteins. In many cases these first two layers of innate defense are enough to ward off infection. The third line of defense is much more specific and is categorized as an adaptive defense or the body’s immunity to a specific pathogen. This immune response requires the body
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