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Melivilla
Sep 19, 2012, 05:59 AM
Do humans have an open circulatory system
Curlyben
Sep 19, 2012, 06:01 AM
Do we bleed all over the floor ?
Fr_Chuck
Sep 19, 2012, 06:15 AM
http://www2.gsu.edu/~bioasx/closeopen.html
Hope the photos help,