What are antibodies produced by and what are they?
Antibodies are glycoproteins produced and secreted by B lymphocytes (B cells).
Each antibody recognizes a specific antigen unique to its target.
Antibodies protect organisms from foreign objects by binding specific antigens, which causes clumping of particles and precipitation of antibody-antigen products. The antigen-antibody associates are then removed by macrophages.
In addition, antibodies can block viral receptors and stimulate other immune responses.