CBSE Class 10 Answered

The agglutination of blood is called Hemagglutination. Here, the clumping of red blood cells occur in the presence of an antibody. The red blood cells will be linked together, like bunches of grapes, by the antibodies.

Blood agglutination will occur in case of transfusions between incompatible blood groups. In such cases, the red blood cells from the donated blood will clump or agglutinate. The agglutinated red cells can clog blood vessels and stop the circulation of the blood to different parts. The agglutinated red blood cells also crack and its contents leak out in the body. The hemoglobin of red blood cells becomes toxic when outside the cell. All this can be fatal to the patient.