Dec 7, 2025 · There are eight main blood types, defined by the ABO system and the Rh factor. Type O-negative blood is a universal donor, and AB positive blood is a universal recipient. …

The two most important blood group systems are ABO and Rh; they determine someone's blood type (A, B, AB, and O, with + or − denoting RhD status) for suitability in blood transfusion.

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 negative (AB-), O …

Nov 29, 2025 · Blood group - ABO, Rh, Genetics: Red cell groups act as markers (inherited characteristics) for genes present on chromosomes, which are responsible for their expression.

1 day ago · Overview of the ABO and Rh Blood Group Systems The ABO and Rh systems form the basis for blood type classification. Your blood type means more than just a random label. It …

Feb 19, 2025 · You either have this antigen (meaning your blood type is “Rh+” or “positive”), or you don’t (meaning your blood type is “Rh−” or “negative”).

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.

Dec 20, 2025 · Different blood types include A, B, AB, and O, classified by the ABO system. Your Rh factor determines if your blood type is positive or negative.

Mar 31, 2024 · If you have type O blood, you can only receive type O blood. If you are Rh+, you can receive Rh+ or Rh- blood. If you are Rh-, you can only receive Rh- blood. Type O blood …

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.