Everyday materials in sculpture: Blood

So according to Mary Stewart's Launching the Imagination, some contemporary sculptures are made using blood (263). This seriously made me raise an eyebrow. Then I stepped back and realized that she probably wasn't meaning that blood was the primary material of the sculpture, though something like frozen blood would make a provocative, if not controversial, material choice for a sculpture, albeit a temporary sculpture. She more likely meant that blood has been used as an accent material in sculpture. I would be curious to see such a sculpture.