Person with ‘O’ blood group is considered as ‘universal donor’.

Question

Explain with reason :

Person with ‘O’ blood group is considered as ‘universal donor’.

Answer 1

Person with ‘O’ blood group does not have any antigen on his/her RBCs. The ‘O’ type blood thus cannot cause clotting reactions in the body of the recipients. Such persons with ‘O’ blood group can donate blood to any person having any blood group therefore they are considered as ‘universal donor’.