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It is essential to know your blood group as it saves time in case of emergencies. Blood transfusions are now an important part of any surgical interventions and healthcare procedures. Hence, it is important for an individual to know his blood group. Similarly, pregnant women must be aware of their blood groups as the emergency can stage at any moment.
Different components come together to form blood. These include plasma, blood cells, red cells (erythrocytes), white cells (leukocytes) and platelets. Each serve different functions and are extremely essential for the proper working of the body system.
Red blood cells or erythrocytes contain antigens on their surface, which are a type of proteins. The plasma is known to carry antibodies that attack certain antigens when present.
Depending upon the type of red blood cell antigens, the blood groups are classified. The most important type includes the ABO and the rhesus type.
ABO was discovered first and hence is considered primary attribute for evaluating the different types of blood groups. The distribution of the antigens in the red blood cells is as below:
People with rhesus antigens on the surface of their red blood cells are considered Rhesus (Rh) positive. Around 3 in every 20 people do not contain the rhesus antigens in their red blood cells and hence are said to be Rh negative.
You inherit the genetic makeup of your DNA from your parents. Similarly, the genetic makeup is also responsible for determining the type of antigen present in your red blood cells. That is why; blood group test is considered important evidence in paternity test.
Many other antigens are also present on the surface of the red blood cells. However, they are not as important as the A, B and the Rh antigens and are considered as minor groups.
While carrying out blood donation, Rh-negative blood is given to Rh-negative patients. However, Rh-positive patients can receive both the Rh-positive as well as Rh-negative blood.
Thus, the knowledge about the blood groups is extremely important as it plays a major role during blood transfusion in an emergency.
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