Cardiovascular SystemBlood |
Glasgow Coma Scale |
The table below explains the relationship between blood types and antigens and antibodies.
| Blood Type | Antigen on Red Blood Cell Surface | Antibody in Plasma |
| A | A | Anti-B |
| B | B | Anti-A |
| AB | A and B | Neither anti-A nor anti-B |
| O | Neither A nor B | Both anti-A and anti-B |
Whole blood can be safely donated every 50 days. © iStockphoto.com/David H. Lewis.