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 ...

A new study has found that we are still far from understanding the blood classification system – and more blood types are ahead of us.

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 ...