Reconciliation of the general ledger to sub-ledgers is another type we will review. The general ledger (or simply ledger or G/L) is a collection of all balance sheet and income statement accounts. The general ledger also includes all journal entries posted to accounts.
Blood type (or blood group) is determined, in part, by the ABO blood group antigens present on red blood cells. A blood type (also called a blood group) is a classification of blood based on the presence or absence of inherited antigenic substances on the surface of red blood cells (RBCs). Blood group A individuals have the A antigen on the surface of their RBCs, and blood serum containing IgM antibodies against the B antigen. 2  Therefore, 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.
A and B are antigens that are on the surface of red blood cells. People have one, both, or none. If you don't naturally produce the antigen, your body's white blood cells will attack and destroy red blood cells that carry them. So if a person with type A blood is injected with type B blood, the body of that person will attack the type-B blood cells. A person with AB positive blood is a universal receiver, because they already produce all of the normal antigens present on red blood cells. So a AB+ person's body will not attack red blood cells that carry some, all, or none of the antigens. Likewise, O- is called the universal donor, because it lacks all antigens.