Question

O is universal donar give two Reasons

Answer 1

➡The plasma of A, B and O individuals have
natural antibodies (agglutinins) in them.

➡Surface antigens are called agglutinogens.

➡The antibodies (agglutinin) acting on
agglutinogen A is called anti A and the agglutinin acting on agglutinogen B is called anti B.

➡Agglutinogens are absent
in O blood group.

➡Agglutinogens A and B are present in AB blood group and do not contain anti A and anti B in them.

$\textbf{Thus the presence of antibodies\\ A and B and the absence of antigens\\makes the group O\\as a UNIVERSAL DONOR.}$