Question

write a note on different types of blood group.

Answer 1

transfusions during operations and accidents. Without knowing its group it cannot be donated or received. The blood groups fall into four categories. They are A, B, AB, and O. If a man belongs to group A, it means that on his RBC, there is a special compound, which mazy be designated as ‘A’. If a person belongs to group B, it means that on his RBC, there is a different compound called ‘B’; a person of AB group has both these compounds; and a person of O group does not have any of these compounds. O group is universal donor, while AB group is universal receiver.

Besides these types, more than 85% of the people can be Rh positive and 15% Rh negative. Before blood transfusion Rh factor is also testd. Rh factor is also a compound on RBC which was first seen on the RBC of Rhesus monkey. If this compound is present in man, the person is Rh positive, and if this is absent, he or she is Rh negative.

You can feel pumping of blood through the heart in certain places of the body. The blood vessels in the wrist are the most convenient. Take your left wrist in your right hand and press gently like a doctor. You will feel pulsations with your right thumb. Count the number of pulsations per minute while resting. Again count the number after brisk exercise or after running for a few minutes. Observe the time take to restore the original pulse rate. The p

Answer 2

Hey mate
here is your answer

Karl Landsteiner categorised blood groups into the ABO and Rh blood groups. The different ABO blood groups are referred to as blood group A, B, AB and O. The presence of the ‘Rh’ antigen in blood is called ‘Rh’ positive and the absence of the same is called ‘Rh’ negative.
 
Individuals with A blood group have ‘A’ antigen and anti-B antibody, B blood group have ‘B’ antigen and anti-A antibody, AB blood group have both ‘A’ and ‘B’ antigens and no antibodies, O blood group have no antigens and have both anti-A and anti-B antibodies.

During blood transfusion, specific antigens and antibodies present in the blood may react and cause the agglutination of RBCs. Hence, blood group matching is carried out before blood transfusion. This table showcases the results of ABO blood group matching between different blood groups of donors and recipients.

From the table, it is clear that individuals with blood group ‘O’ can donate blood to people of all blood groups, but receive blood only from individuals with blood group ‘O’. While individuals with blood group ‘AB’ can receive blood from all blood group types, they can donate blood only to individuals with blood group ‘AB’.

Hence, individuals with blood group ‘O’ type are called ‘universal donors’, while individuals with blood group ‘AB’ type are called ‘universal recipients’. In addition to ABO blood grouping, Rh blood group matching is also carried out during blood transfusion. This is because, if Rh positive blood is transfused to a Rh negative person, it can induce the formation of ‘Rh’ antibodies resulting in the agglutination of RBCs.

Such incompatibility takes place when an Rh negative woman carries an Rh positive foetus, leading to erythroblastosis foetalis. Erythroblastosis foetalis can be prevented by injecting anti-Rh antibodies, commercially called rhogams into the Rh negative mother, immediately after her first delivery.