Dying on a cross wouldn’t cause a person to bleed out. I thought Jesus supposedly died from being unable to breathe, due to the position of being placed on the cross. A body has to do more work to breathe when in that position. A person has to lift the torso to inhale, and upon exhaling they would slump back down to allow the nails in their palms to suspend their weight. I don’t know. That’s how my sixth grade teacher explained death by cross to our class.