These are the main blood groups in the ABO blood group system. Each blood type is determined by the presence or absence of specific antigens on the surface of red blood cells.

What are the four main blood types?

Plasma contains clotting factors which are crucial for blood coagulation. It is used to treat hemophilia, a condition where the blood doesn’t clot properly.

What component of blood is primarily used in treating patients with hemophilia?

AB negative is the rarest blood type, found in less than 1% of the population. It is unique because people with this blood type can receive red blood cells from any other blood type.

What is the rarest blood type?

How often can a person typically donate blood?

Leukoreduction is the process of removing white blood cells (leukocytes) from donated blood. This is done to reduce the risk of certain transfusion-related complications.

Removal of white blood cells from the blood

What is leukoreduction in blood transfusion?

Blood makes up about 7% of the human body's weight. An average adult has approximately 10 pints (about 4.7 liters) of blood.

What percentage of the human body's weight is accounted for by blood?

Red blood cells contain hemoglobin, an iron-containing protein, which binds to oxygen and carries it from the lungs to the rest of the body.