Question

give reason.persons of blood o are universal donner​

Answer 1

People with type O- blood are called universal donors because their donated red blood cells have no A, B or Rh antigens and can therefore be safely given to people of any blood group.

◆ ABO blood group system -

• Carl Landsteiner classified blood groups according to presence/absence of antigens A & B on RBCs.
Group A have A antigen.
Group B have B antigen.
Group AB have both A & B antigen.
Group O have no antigens.

# Group O is called universal donor because -

Group O doesn't have any antigens on its RBCs.
So our immune system system doesn't react to RBCs of O blood group as there is no antigen.
As this blood can be given to person with any blood group, person with O blood group are universal donor.

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Answer 2

Answer:

persons with blood of group o are called universal donor because they can give or donate their blood to any of the blood groups ie. A,B,AB & O