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  #55  
Old 28 September 2007, 01:25 PM
major accent
 
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I believed that venous blood was blue and arterial blood was red until I was a freshman in high school. While I don't recall having read explicitly that venous blood was blue, I had a text on anatomy that showed the circulatory system with veins in blue and arteries in red, and I knew that arterial blood delivered the oxygen and somehow concluded that venous blood was blue (probably using my own arm as a reference). I was genuinely shocked to discover that this wasn't true.
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