Ascent and reentry Effect of spaceflight on the human body

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during takeoff , reentry space travelers can experience several times normal gravity. untrained person can withstand 3g, can blackout @ 4 6g. g-force in vertical direction more difficult tolerate force perpendicular spine because blood flows away brain , eyes. first person experiences temporary loss of vision , @ higher g-forces loses consciousness. g-force training , g-suit constricts body keep more blood in head can mitigate effects. spacecraft designed keep g-forces within comfortable limits.







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