Biology 119 - BLOOD TYPING PHOTOS

Biology 119

BLOOD TYPING REACTIONS

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This image shows the blood typing tray with the antibody sera present, but no blood.

The A sera is colored blue & B sera is colored yellow, while the Rh sera is colorless for easy identification.

The images below are blood samples from students mixed with antibodies for A, B & Rh.
When an antibody finds its specific antigen, antigen-antibody complexes form. This process is called agglutination. You can recognize agglutination by the clumping of blood cells into larger & larger groups within a blood sample.
Rh reactions vary in strength from slight to very strong agglutination. If the Rh antibody finds Rh antigens on red blood cells, we say the person's blood type is positive (+).
For A & B antigens, the agglutination reaction is usually quite strong, but its appearance can vary with the ratio of blood to antibody used in each test.
If the A antibody finds A antigens on red blood cells, we say the person's blood type is A. If the A antibody finds B antigens on red blood cells, we say the person's blood type is B. If a person's blood reacts with both A & B antibodies, they are blood type AB.

Blood Type O+
Blood Type A+
Blood Type B+

Blood Type AB+
Blood Type B+
Blood Type O-

Practice your blood typing skills with these samples. Click on Blood type to check the answer.

Blood Type O+	Blood Type A+	Blood Type B+
Blood Type AB+	Blood Type B+	Blood Type O-