- See also changes related to Opsonins, or pages that link to Opsonins or to this page or whose text .
- Immunology : The study of all aspects of the immune system in all animals.
- Phagocytosis : That part of immune response in which defensive cells such as neutrophils and macrophages surround and "digest" foreign particles
- : According the Medical Subject Headings of the National Library of Medicine, the complement system is made up of a series of Serum glycoproteins that are part of the host defense mechanism of complement activation, which creates the "complement membrane attack complex"
- Immunoglobulin : Proteins produced by lymphocytes, which are primarily antibodies to attack material the body considers hostile, although some may act as cytokines, signaling to other cells
- Macrophage : A type of leukocyte (i.e., white blood cells) that is associated with chronic inflammatory response. It digests foreign cells using the mechanism of phagocytosis, and both circulates in the blood, but later attaches to tissue as a part of local immune response.
- Neutrophil : Leukocytes (white blood cells) whose primary role is in the cell-mediated immune system, where they destroy hostile substance by phagocytosis. They do release interleukin-12.