Blood group test showing reactions between blood types (down right) and their antibodies (across top). There are four human blood types: A,B,AB and O. Type A blood has type A antigens on its blood cells and anti-B antibodies in its serum. Type B blood is the reverse. Mixing type A blood with anti-A antibodies leads to an agglutination reaction,the result of which is seen as dense red dots. AB blood has both A and B antigens on its cells,but no antibodies. Type O blood has both antibodies and no antigens. Anti-D is an antibody used to test for Rhesus antigens,and it reacts with Rhesus positive blood. Typing is necessary to prevent reactions during blood transfusions | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Tek Image |
Taille de l’image : | 3115 px × 3069 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |