Search results
Results From The WOW.Com Content Network
Foreign bodies in the peritoneum eventually become contained in a foreign body granuloma. In the extremely rare case of retained ectopic pregnancy , this forms a lithopedion , which involves the fetus being too large to be reabsorbed, and is calcified [ 13 ] as a means of shielding the surrounding tissue from infection.
In immunology, self molecules are components of an organism's body that can be distinguished from foreign substances by the immune system. [6] Conversely, non-self molecules are those recognized as foreign molecules.
Immunogenicity is the ability of a foreign substance, such as an antigen, to provoke an immune response in the body of a human or other animal. It may be wanted or unwanted: It may be wanted or unwanted:
Serum substances that aggregate bacteria and precipitate bacterial toxins: von Gruber and Durham (1896), Kraus (1897) Hemolysins: Serum substances that work with complements to lyse red blood cells: Jules Bordet (1899) Opsonins: Serum substances that coat the outer membrane of foreign substances and enhance the rate of phagocytosis by macrophages
Monocytes ingest foreign or dangerous substances and present antigens to other cells of the immune system. Monocytes form two groups: a circulating group and a marginal group that remain in other tissues (approximately 70% are in the marginal group).
A foreign body reaction (FBR) is a typical tissue response to a foreign body within biological tissue. [1] It usually includes the formation of a foreign body granuloma . [ 2 ] Tissue encapsulation of an implant is an example, as is inflammation around a splinter . [ 3 ]
An illustration that shows how antigens induce the immune system response by interacting with an antibody that matches the molecular structure of an antigen. In immunology, an antigen (Ag) is a molecule, moiety, foreign particulate matter, or an allergen, such as pollen, that can bind to a specific antibody or T-cell receptor. [1]
identify and remove foreign substances present in organs, tissues, blood and lymph, by specialized white blood cells activate the adaptive immune system through antigen presentation act as a physical and chemical barrier to infectious agents; via physical measures such as skin and mucus, and chemical measures such as clotting factors and host ...