Which points out that your blood wouldn’t boil only while your heart is beating.
It also says “During this time, water vapor will form rapidly in the soft tissues and somewhat less rapidly in the venous blood. This evolution of water vapor will cause marked swelling of the body to perhaps twice its normal volume unless it is restrained by a pressure suit.” Of course if the body is in a pressure suit there isn’t much dehydration going on.
http://www.geoffreylandis.com/vacuum.html
Which points out that your blood wouldn’t boil only while your heart is beating.
It also says “During this time, water vapor will form rapidly in the soft tissues and somewhat less rapidly in the venous blood. This evolution of water vapor will cause marked swelling of the body to perhaps twice its normal volume unless it is restrained by a pressure suit.” Of course if the body is in a pressure suit there isn’t much dehydration going on.