There are few antigens and antibodies present on our red blood cells. They are used to tell the blood type and helps in the classification of blood. The presence of specific types of antigens and antibodies decides to or from whom an individual can donate or receive blood respectively. There are such blood types with which an individual can be a universal donor or recipient. The ABO blood type has two antigens A and B. A person having same antigens can donate blood to one another. Rhesus (Rh) is also an antigen present on the red blood cells. In case a person is Rh positive, they have this antigen and if the person is Rh negative, the RBCs of the person lacks Rh antigen. In case, Rh positive blood is administered to the Rh-negative person, the Rh antigen would be treated as a foreign invader and elicit an immune response.

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Chapter 23, Problem 8E

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There are few antigens and antibodies present on our red blood cells. They are used to tell the blood type and helps in the classification of blood. The presence of specific types of antigens and antibodies decides to or from whom an individual can donate or receive blood respectively. There are such blood types with which an individual can be a universal donor or recipient.

The ABO blood type has two antigens A and B. A person having same antigens can donate blood to one another. Rhesus (Rh) is also an antigen present on the red blood cells. In case a person is Rh positive, they have this antigen and if the person is Rh negative, the RBCs of the person lacks Rh antigen. In case, Rh positive blood is administered to the Rh-negative person, the Rh antigen would be treated as a foreign invader and elicit an immune response.

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