Not all blood is alike. Learn about blood typing and the rarest and most common types of blood and how they can impact your blood donation.

What are the different blood types? There are eight blood types included in the ABO and Rh blood group systems: A positive (A+), A negative (A-), B positive (B+), B negative (B-), AB positive (AB+), AB …

Nov 28, 2023 · Learn about blood types, including A, B, AB, O and Rh+ and Rh-. See which blood type is the universal donor and universal recipient.

Dec 26, 2024 · Every person has a unique blood type because the immune cells (antigens) on their red blood cells differ. The discovery of blood types in 1901 saved many lives and permanently changed …

The image illustrates the presence of the Rh factor across different blood types, examines the antigens associated with each ABO blood group, and shows which traits are dominant and recessive.

Dec 7, 2025 · The ABO system has four major blood types: A, B, AB, and O. Blood types are further categorized by the presence (positive or +) or absence (negative or -) of the Rh (D) antigen on the …

Dec 20, 2025 · There are different blood types: A, B, AB, and O, with each also being Rh-positive or Rh-negative. Knowing your blood type is important for safe blood transfusions and organ transplants. …

Nov 29, 2024 · Many people know where they fit into the classic ABO blood typing system, which designates blood as type A, B, AB or O. But these four basic blood groups aren't the end of the story. …

It classifies blood into four types—A, B, AB, and O—based on the presence or absence of A and B antigens. For people who have type A blood, their red cells express A antigens, and they produce …

Learn about the different blood types and why matching them is important for blood donations.