note on humoral immunity
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Humoral immunity is the type of host defence that is mediated by antibodies, the products of B cells. Antibodies are secreted into mucosal lumens, the blood, and interstitial fluids, and combat microbes at all these sites.
Hey There! Humoral immunity is the aspect of immunity that is mediated by macro-molecules found in extracellular fluids such as secreted antibodies, complement proteins, and certain antimicrobial peptides. This is named so, because it involves substances found in the humors, or body fluids. It contrasts with cell-mediated immunity. Its aspects involving antibodies are often called antibody-mediated immunity. It also refers to the effector functions of antibodies, which include pathogen and toxin neutralization, classical complement activation, and opsonin promotion of phagocytosis and pathogen elimination.