- Blood groups - ABO system.

- Many systems have been discovered to differnetiate bloog groups,the most famous system is ABO system.



- ABO system represent antigenic components on the surface of RBCs according to which
this system was made.
- O RBCS means that there is no antigens on the surface of RBCs so we can give O RBCS
to all other types of RBCs groups.

- B RBCS means that there is B antigens on the surface of RBCs so we can give B RBCS
Only to B person or AB person.

- A RBCS means that there is A antigens on the surface of RBCs so we can give A RBCS
Only to A person or AB person.

- AB RBCS means that there Are both A,B antigens on the surface of RBCs so we can give AB RBCS Only to AB person.