Explaining Our Body on Instagram: "Blood types play a crucial role in human health, influencing everything from blood transfusions to pregnancy compatibility. The most well-known system is the ABO blood group, which classifies blood as A, B, AB, or O based on the presence or absence of specific antigens on red blood cells. Each type also carries antibodies that react against incompatible blood, which is why matching blood types correctly during transfusions is so important. Another key factor is