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submitted 2 weeks ago by fossilesque@mander.xyz to c/science_memes@mander.xyz
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[-] bdonvr@thelemmy.club 24 points 2 weeks ago* (last edited 2 weeks ago)

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. iirc this can slightly negatively affect vision long term.

Most of your body processes are in a small enough space that capillary action overtakes gravity.

[-] Evilsandwichman@hexbear.net 3 points 2 weeks ago

With no gravity though you'll have higher blood pressure to your head (and less to the legs)

So what you're saying is they should alternate between upside down and right side up

[-] bdonvr@thelemmy.club 3 points 2 weeks ago

Technically if they did that fast enough the blood pressure on both would get higher, potentially MUCH higher.

this post was submitted on 10 Apr 2026
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