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 type - Wikipedia
A blood type (also known as a blood group) is a classification of blood based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells …
Blood Types: What They Are and Mean for Your Health
Mar 14, 2023 · There are four main blood types: A, B, AB and O. Blood bank specialists determine your blood type based on whether you have antigen A or B on your red blood cells.
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 Types Explained: Health, Compatibility, and Rare Types
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.
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 …