Veins are small so capillary action keeps things in order.
With no gravity though you’ll have higher blood pressure to your head (and less to the legs)- it kinda makes astronauts faces a bit puffy.
Most of your body processes are in a small enough space that capillary action overtakes gravity.
ajmaxwell@lemmy.world 4 weeks ago
There’s a slight increase in the blood pressure in your upper body, and a small possibility of thrombosis, blood clots forming in your veins. But after 50+ years of space flight no one has had complications.
MonkderVierte@lemmy.zip 4 weeks ago
Though most don’t stay more than a few months up there.
gandalf_der_12te@discuss.tchncs.de 4 weeks ago
also who would stay more than 6 months in space? a journey to mars takes about 6 months on the most fuel-efficient trajectory.