Blood type - Wikipedia
A blood type (also known as a blood group) is a classification of blood, based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells (RBCs). These antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system.
Antigen: What It Is, Function, Types, & Testing - Cleveland Clinic
Antigen tests examine your blood, spit, pee, poop or other bodily fluids for specific markers of a disease. They’re usually used to find out if you have a viral illness such as the flu or COVID-19 or to monitor cancer treatment.
Blood group antigens are surface markers on the red blood cell …
A blood group system contains antigens controlled by a single gene (or by multiple closely linked loci), and the system is genetically distinct. At the time of writing, there are 22 blood group systems, including the ABO, Rh, and Kell blood groups which contain antigens that can provoke the most severe transfusion reactions.
The ABO blood group - Blood Groups and Red Cell Antigens - NCBI Bookshelf
Although the ABO blood group antigens are regarded as RBC antigens, they are actually expressed on a wide variety of human tissues and are present on most epithelial and endothelial cells. Each human RBC expresses about 2 million ABO blood group antigens.
Blood and the cells it contains - Blood Groups and Red Cell Antigens …
Blood carries oxygen and nutrients to living cells and takes away their waste products. It also delivers immune cells to fight infections and contains platelets that can form a plug in a damaged blood vessel to prevent blood loss. Through the circulatory system, …
Blood Types: Antigens, Antibodies and Transfusions - Biomed …
Blood type is determined by which antigens present on red blood cells. Antigens are macromolecules (usually proteins) that can elicit an immune response and help the body determine ‘self’ vs. ‘foreign’. Antibodies recognize antigens and target them for degradation.
ABO blood group system | Definition, Blood Type, & ABO Antigens …
2024年10月17日 · ABO blood group system, the classification of human blood based on the inherited properties of red blood cells (erythrocytes) as determined by the presence or absence of the antigens A and B, which are carried on the surface of the red cells. Persons may thus have type A, type B, type O, or type AB blood. The A, B, and O blood groups were first ...
Blood group - Antigens, Antibodies, Immunity | Britannica
2024年10月23日 · Most blood group antibodies are found either on immunoglobulin G (IgG) or immunoglobulin M (IgM) molecules, but occasionally the immunoglobulin A (IgA) class may exhibit blood group specificity. Naturally occurring antibodies are the result of immunization by substances in nature that have structures similar to human blood groups.
ABO Blood Group System: Antigens, Typing and Tests
ABO antigens can be found on red cells, white cells, platelets and many circulating proteins. Transfusion incompatibility can cause acute intravascular hemolysis, renal failure and death. Can also be found on many tissues like the kidneys, heart, bowel, pancreas and lungs and incompatible transplantation leads to acute humoral rejection.
Blood group | Types, Uses, & Facts | Britannica
2024年10月23日 · Blood group, classification of blood based on inherited differences in antigens on the surfaces of the red blood cells. The most well-known classification, the ABO blood group system, was developed by Austrian-born American biologist Karl Landsteiner in 1901.