LSA sophomore Julie Wooton, background, and law student Sarah Molenkamp donate to the U-M vs. Ohio State Blood Battle Nov. 9 in the Michigan Union Ballroom. Before they meet on the football field this weekend, the schools are competing in the 24th annual competition to see which institution can collect the most pints of blood from Nov. 7-18. (Photo by Martin Vloet, U-M Photo Services)