IMMUNOLOGY

Detailed explanation-1: -The innate immune responses are the first line of defense against invading pathogens. They are also required to initiate specific adaptive immune responses. Innate immune responses rely on the body’s ability to recognize conserved features of pathogens that are not present in the uninfected host.

Detailed explanation-2: -Found in your blood and lymph system, IgM antibodies act as the first line of defense against infections. They also play a large role in immune regulation.

Detailed explanation-3: -The immune system’s three lines of defense include physical and chemical barriers, non-specific innate responses, and specific adaptive responses.