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The blood typing kit includes one bottle of Anti-A_serum, one bottle of Anti-B_serum, one bottle of Anti-Rh (also called Anti-D) serum, several blood typing trays with three wells each, toothpicks for mixing the liquids in the wells and several bottles of artificial blood. Each separate bottle of fake blood represents one person.

Add several drops of Anti-A to the well labeled A, several drops of Anti-B to the well labeled B and several drops of Anti-Rh to the well labeled Rh. These chemicals represent antibodies to destroy their respective blood types. For example, Anti-A is the antibody to destroy A. So, if Anti-A reacts in well A with a blood sample, then that sample contains type A blood.

Look for a change in appearance within a well. If there is a reaction (called agglutination), the appearance of the sample will change. It will start to look grainy, have a dusty-looking surface, or appear to be shot full of black pepper. All of these types of visual changes indicate a positive response. So, if you see a change in well B, then the person has type B.

Testing tray for blood typing (notice that there are only three wells) Testing tray for blood typing (notice that there are only three wells) Bottle of anti A serum (the antibody to destroy A) Bottle of anti B serum (the antibody to destroy B) Bottle of anti Rh serum (the antibody to destroy Rh) Bottle of simulated blood (most kits contain two or three samples) A positive test for Type A (A+) A positive test for Type B (B+) A positive test for Rh (Rh+) A negative test for Type A (A-) A negative test for Type B (B-) A negative test for Rh (Rh-)