Your Screen Is Covered In Human Blood

The video explores the study of blood under a microscope, tracing its historical understanding from ancient Greek humors to modern circulatory system theories. It highlights the differences between open and closed circulatory systems using daphnia as an example. The video also discusses the components of blood, focusing on hemoglobin and its role in oxygen transport. It concludes with the history of microscopic studies and the development of the ABO blood grouping system.

What new insight or understanding did you gain from this video?