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
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 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 (RBCs).
Blood Types - A, B, AB, O, Rh - Science Notes and Projects
Nov 28, 2023 · Blood types are a classification of blood based on the presence or absence of specific antigens on the surface of red blood cells. These antigens determine the body’s immune response to …
Blood Types: Main Groups, Most Common, and Rarest
Nov 23, 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. During pregnancy, …
Blood Types Explained: Health, Compatibility, and Rare Types
Feb 19, 2025 · What Are Blood Types? While everyone’s blood contains the same basic parts, there are eight different blood types. The type you have depends on genes you inherit from your biological...
Different Blood Types Explained: A, B, AB, and O - Health
Mar 7, 2025 · Your blood type—A, B, AB, or O—is determined by the ABO system and the Rh factor, both of which depend on specific antigens on your red blood cells.