It is the body's first line of defense against invading pathogens. It provides immediate, nonspecific protection through physical barriers, such as the skin and mucous membranes, and cellular components, such as phagocytes and natural killer cells.
It is the body's first line of defense against invading pathogens. It provides immediate, nonspecific protection through physical barriers, such as the skin and mucous membranes, and cellular components, such as phagocytes and natural killer cells.