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 (RBCs).
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 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.
The 8 Blood Types Explained: Importance, Rarity, & Donations
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 …
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.
Understanding Your Blood Type With the ABO System and Rh Factor
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 …
Different Blood Types Explained: A, B, AB, and O - Health
4 days ago · Blood types A, B, AB, and O affect transfusion compatibility. Blood type O-negative is the universal donor, while AB-positive is the universal recipient.
Blood types - NHS Blood Donation
Factors that determine your blood type and how you can find out your blood type.
Blood Types: What They Are and Why They Matter - MedicineNet
Nov 18, 2025 · Just like your skin tone and eye color, your blood type is something you’re born with. It runs in your family and is determined by your parents’ blood types.