Why the human body becomes longer at the aerospace?

The human body begins to expand as you travel into low pressure environments. At extreme altitudes without the proper suiting the blood will literally ume a lower boiling point and boil at 37 Celsius. As steam travels throughout the body, bloating occurs but not enough to breakdown blood vessels by virtue of their porous properties and elasticity. Also, gravity is lessened as you approach the limits of the exosphere so there is less consistency and cohesion.