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Red Gold: The Epic Story of Blood
A companion piece to the Public Broadcasting Service (PBS) special, this site "delves into the facts and myths about human blood and its impact on everything from religion and medicine to commerce and popular culture throughout history." It offers information on the circulatory system, blood's physical properties, transfusions, donating blood, scientists, and bloodletting, as well as lesson plans for teachers and a discussion guide.
http://www.pbs.org/wnet/redgold/

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