Cold agglutinin disease. Cold agglutination - at body temperature, the antibodies do not attach to the red blood cells. At lower temperatures, however, the antibodies react to Ii antigens, bringing the red blood cells together, a process known as agglutination.
American Robin (Turdus migratorius). The robin red breast was designated as the state bird of Michigan by House Concurrent Resolution No. 30, the Senate concurring, on April 8, 1931.
Michigan State Flower. Apple blossom is the Michigan State flower, and also the state flower of Arkansas. There are, probably, nearly 1000 varieties of Apple blossom cultivated in the United States, and all of which are said to be derived from the Wild crab (Pyrus coronaria, Linn).