Blood Type Chart: A, B, AB, and O Explained #2112856 (License: Personal Use)

This diagram displays the four primary ABO blood types-O, A, B, and AB-each represented by a vibrant red circle with a gradient halo and white lettering against a black backdrop. The layout forms a diamond arrangement for intuitive visual comparison, emphasizing compatibility and classification in transfusion medicine. Designed for clarity, it supports educational content, healthcare signage, or donor registration materials.

Used on medical websites, biology textbooks, blood donation campaign pages, or health infographics to explain ABO blood group systems; targets users seeking quick visual reference for blood typing or preparing for donations/tests.