Today’s Video of the Day comes from the American Chemical Society’s Reactions series and features a look how Hollywood creates the most realistic fake blood for movies.
Blood gets its red color due to a protein called hemoglobin, which is made up of smaller subunits called hemes. When hemes bind to iron molecules, the iron molecules bond to oxygen. This interaction between oxygen and iron turns blood red, and the more oxygen present, the redder the blood gets.
By Rory Arnold, Earth.com Staff Writer
Video Credit: American Chemical Society