Understanding how human circulation works plays a critical role in saving lives, especially during emergencies, surgeries, and transfusion procedures (World Health Organization). One concept that often raises questions is the universal blood group. This term directly relates to how RBCs

When people ask what are erythrocytes, they usually want to understand how these tiny cells support life every second. Erythrocytes, commonly known as red blood cells, circulate continuously and deliver oxygen to tissues while removing carbon dioxide. Because circulation affects