some people say blood is blue and it turns red when the air hits it. is this true? why is it that colour?
some people say blood is blue and it turns red when the air hits it. is this true? why is it that colour?
Posted on March 14, 2015 by in Question. Comments Off on some people say blood is blue and it turns red when the air hits it. is this true? why is it that colour?
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