Comments and Analysis on Blood Lab

In our blood lab, Mr. Kelly had us experiment and find the types of blood, A, B, AB, or O. Though it was not real blood, it had certain substances in it that gave the same effect as blood. We put 2 separate drops of 2-3 drops of blood onto a glass slide. Then we added a blue liquid to one, and a yellow to another and mixed them.
As you can see, in the picture above we tested type A blood. When we added the blue liquid to the left sample of blood, it formed a precipitate. However, when we added the yellow to the other A type sample, it remained clear. It further proves that the blood is Type A. The reason is because for O, the blood is to remain clear when you add the blue and yellow, the A is supposed to form a precipitate from the blue, but not from the yellow, the B is not supposed to form a precipitate from the blue, but is from the yellow, and finally the AB forms precipitates on both when the blue and yellows are added.