Blood Types Explained - A, B, AB and O | Red Cross Blood Services
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.
Blood Types: What They Are and Mean for Your Health
Mar 14, 2023 · 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 …
Blood type - Wikipedia
Blood type Blood type (or blood group) is determined, in part, by the ABO blood group antigens present on red blood cells. A blood type (also known as a blood group) is a classification of …
Understanding Your Blood Type With the ABO System and Rh …
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) …
Different Blood Types Explained: A, B, AB, and O - Health
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 …
Blood Types Explained: Health, Compatibility, and Rare Types - WebMD
Feb 19, 2025 · Learn what determines your blood type and why it's important. Understand blood type compatibility, donation guidelines, and the need for safe transfusions.
Blood Types - A, B, AB, O, Rh - Science Notes and Projects
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.
Blood group | Types, Uses, & Facts | Britannica
5 days ago · A blood group is a classification of blood based on inherited differences in antigens on the surfaces of the red blood cells. The most well-known classification, the ABO blood …
Blood Types: What They Are and Why They Matter - MedicineNet
Nov 18, 2025 · There are 4 major blood types: Type A red blood cells have A-type antigens. Type B has B antigens. Type AB has both A and B antigens. Type O has neither A nor B antigens. …
Blood types: What are they and what do they mean? - Medical News Today
Jan 16, 2024 · ABO is the best-known system for grouping blood types, though there are other methods. There are four major categories within the ABO group: A, B, O, and AB.