Why o blood is called universal donor?
"O" blood is called univerasal donor because anybody can take it. For example, if you need a blood tranfusion, anybody with "o" blood can donate to you. but on the other hand, only "o" blood can give to "o' blood.
Why is a person with type O blood called a universal donor and a person with type AB blood called a universal receiver?
What are the four blood types and which is the universal donor and which is the universal recipient?
Type "O" blood is called the universal donor because an individual with any other blood type can receive it. The the problem is, individuals with Type "O" blood can only receive type "O" blood. This combination makes demand for this blood very high. Individuals with type "O" blood are urged to donate blood as often as possible.
Type O-negative blood does not have any antigens. It is called the "universal donor" type because it is compatible with any blood type. Type AB-positive blood is called the "universal recipient" type because a person who has it can receive blood of any type. Although "universal donor" and "universal recipient" types may be used to classify blood in an emergency, blood type tests are always done to prevent transfusion reactions.
only O negative blood is called the universal donor. This is because people with this blood type have the ability to donate their blood to ANY other blood type. Blood donation is a complex process and only certain types can receive certain types. O neg is the one blood type that can give to anyone (however, they can only RECEIVE from O neg)