ABO blood groups are the most basic system of blood typing. This system divides blood into four groups – A, B, AB and O. The other main grouping used is the Rhesus (Rh) system, which is either ...

One of the most important characteristics of blood is its type. Knowing your blood type is essential for several healthcare situations. Knowing someone's blood type is important for blood transfusions ...

The exact composition of blood varies between people. This difference in structure is what makes a person’s blood type. Most people use the ABO system to group blood types, and rhesus factor, which is ...

Red blood cells are complex — there's much more to blood types than A, B and O. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Many people know ...

A look at one of the entries that fooled solvers in last week’s puzzles. By Deb Amlen Do you know your blood type? There are multiple ways to group blood types in hematology, but the best known is the ...