Tag Archives: Blood transfusion

Blood Type


Blood Type

Human blood is classified according to the presence or absence of specific markers, called antigens, on the surface of red blood cells. The most commonly encountered blood group system is the ABO system, which classifies blood based on the presence or absence of two antigens, A and B. There are four blood types in this grouping, A, B, AB, and O. Type AB indicates the presence of both antigens and O the absence of both. What do the symbols + and – represent in the classification of blood? More… Discuss

Blood Transfusion


Blood Transfusion

A blood transfusion is the administration of whole blood or a component to counteract blood loss caused by trauma, surgery, or disease. In some cases, whole blood is not needed or is unavailable, so an individual component—plasma, red or white cells, platelets—is used. In whole-blood transfusions, the donor’s blood must be compatible with that of the recipient. Autologous transfusions are those that use the recipient’s own blood, banked in advance. When was the first human blood transfusion? More… Discuss