
ANTIBODIES
Antibodies, or immunoglobulins, are proteins produced by B cells to identify and neutralize pathogens. There are five main types: IgG, IgA, IgM, IgE, and IgD, each with distinct roles. IgG offers long-term immunity, IgA protects mucosal surfaces, IgM initiates responses, IgE triggers allergic reactions, and IgD regulates immunity.
