Human Heart 3D Anatomy: Chambers, Valves & Blood Flow Explained

Watch the Blood Move | Inside a Beating Heart 🫀🔬

How Long Are Your Blood Vessels? 🤔

What's your blood type??? 🩸 Not all blood types can donate to everyone, and understanding why comes down to your ABO blood group and Rh factor. There are four main blood types: A, B, AB, and O, each either positive or negative, giving you eight total blood type combinations. Your blood type is determined by specific antigens, proteins, on the surface of your red blood cells. Type A has A antigens, type B has B antigens, type AB has both, and type O has neither. This matters enormously for donat