ANATOMY

Detailed explanation-1: -There are 4 main blood groups (types of blood) – A, B, AB and O. Your blood group is determined by the genes you inherit from your parents. Each group can be either RhD positive or RhD negative, which means in total there are 8 blood groups.

Detailed explanation-2: -Get our guide to find out. In addition to the A and B antigens, there is a protein called the Rh factor, which can be either present (+) or absent (–), creating the 8 most common blood types (A+, A-, B+, B-, O+, O-, AB+, AB-).

Detailed explanation-3: -The ABO System A type blood has only A antigens on red blood cells. B type blood has only B antigens on red blood cells. AB has both A and B antigens on red blood cells. O has neither A nor B antigens on red blood cells.

Detailed explanation-4: -There are four main blood types: A, B, AB and O. The system for classifying them came about in order to allow safe blood transfusions. Like all cells, red blood cells have molecules on their surface called ‘antigens’. People have different antigens, depending on their genes.

Detailed explanation-5: -O positive. O positive is the most common blood type. More about O positive. A negative. A negative is the universal platelet type. More about A negative. AB positive. Around 2% of donors have AB positive blood. More about AB positive.