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### The ABO and Rh Blood Systems The ABO and Rh systems are the most important bases used for blood transfusion. Mixing incompatible blood groups leads to blood clumping or agglutination, which is dangerous for individuals. The agglutinated or clumped blood clogs blood vessels and stops the circula...

### The ABO and Rh Blood Systems The ABO and Rh systems are the most important bases used for blood transfusion. Mixing incompatible blood groups leads to blood clumping or agglutination, which is dangerous for individuals. The agglutinated or clumped blood clogs blood vessels and stops the circulation of blood to various parts of the body. This phenomenon can result in fatal consequences for the person. ### Mixing Different Blood Types - Be careful in handling breakable materials. - Be careful in handling materials that can irritate your eyes and skin. - Discard waste materials properly. - Wash your hands often. **Steps** 1. Put three drops of blood from container A in one corner of a petri dish. Using another dropper, put another three drops of blood coming from container B in the other corner of the petri dish. 2. Using a sterilized toothpick, mix the blood samples. Observe what happens to the mixed blood. Repeat the procedure, this time using blood samples from containers C and D. 3. Record your observation in your science notebook. What do you think would happen if this phenomenon occurs in our bloodstream? ### The Blood Clotting Process The blood clotting process is our body's mechanism that stops the profuse bleeding caused by an injury. Depending on the severity of injury, the blood should clot in two minutes after a cut or an injury occurs. In the absence of the blood clotting process, bleeding continues and can cause severe blood loss that may eventually lead to the loss of life.