4 blood groups

The four types of blood groups are-A,B,AB, and O.They have their rhesus factors + OR -.

Hi

There are four types of 4 groups of blood.

1.Blood group AB individuals have both A and B antigens on the surface of their RBCs, and their blood serum does not contain any antibodies against either A or B antigen. Therefore, an individual with type AB blood can receive blood from any group (with AB being preferable), but can donate blood only to another type AB individual.
2.Blood group A individuals have the A antigen on the surface of their RBCs, a group A individual can receive blood only from individuals of groups A or O (with A being preferable), and can donate blood to individuals with type A or AB.

3.Blood group B individuals have the B antigen on the surface of their RBCs, and blood serum containing IgM antibodies against the A antigen. Therefore, a group B individual can receive blood only from individuals of groups B or O (with B being preferable), and can donate blood to individuals with type B or AB.

4.Blood group O individuals do not have either A or B antigens on the surface of their RBCs, a group O individual can receive blood only from a group O individual, but can donate blood to individuals of any ABO blood group (i.e. A, B, O or AB).