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.

2021年3月4日 · Antigens and antibodies work together in your immune system. Antigens cause disease while antibodies fight them. We explain both and how they work.

Blood types are determined by the presence or absence of certain antigens – substances that can trigger an immune response if they are foreign to the body. Since some antigens can trigger a patient's immune system to attack the transfused blood, safe blood transfusions depend on careful blood typing and cross-matching.

Antigens are markers that tell your body that something is foreign. Your immune cells make antibodies to recognize and destroy harmful antigens. In fact, you can think of antigens as anti body gen erators. Antibodies are very specific to the antigens they recognize and destroy. They fit onto the antigen like a key to a lock.

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.

2023年11月28日 · Blood types are a classification of blood based on the presence or absence of specific antigens on the surface of red blood cells. These antigens determine the body’s immune response to foreign substances and are crucial in the context of blood transfusions, organ transplants, and pregnancy.

Blood is made up of red blood cells, white blood cells and platelets in a liquid called plasma. Your blood group is identified by antibodies and antigens in the blood. Antibodies are proteins found in plasma. They're part of your body's natural defences.

2025年1月17日 · Blood group - Antigens, Antibodies, Immunity: The red cells of an individual contain antigens on their surfaces that correspond to their blood group and antibodies in the serum that identify and combine with the antigen sites on the surfaces of red cells of another type.

2021年1月21日 · An antibody is a Y-shaped protein that is produced by white blood cells, and that tags antigens for destruction by immune cells. When an antibody binds to an antigen, an antigen-antibody complex is formed.

When specific white blood cells detect the antigen, they produce antibodies so that your body can attack, and hopefully get rid of that invader. Foreign substances that enter our body are detected by white blood cells with the antigen that are present on their surfaces.