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Does high G actually cause a higher or lower blood pressure at heart level? (search engines fail to give an answer) I think the problem there is blood packing t

by htns 7y ago

Does high G actually cause a higher or lower blood pressure at heart level? (search engines fail to give an answer) I think the problem there is blood packing to the lower body, and a sauropod would have enough blood and strong enough veins to be able to hold its head upright. It's not really obvious to me why the sauropod heart->head->heart loop shouldn't be considered as a "siphon". For all the blood that's going up there should be an equal amount of blood going down.

ncmncm 7y ago
This is answered above.
ceejayoz 7y ago
> It's not really obvious to me why the sauropod heart->head->heart loop shouldn't be considered as a "siphon". Because blood vessels are flexible. Siphoning would be disastrous for the body - capillaries would snap shut under the suction and we'd die.
- htns 7y ago
  What would be the force actually shutting the capillaries, if the veins themselves aren't collapsing? The upper part of a siphon still has internal pressure, just less than at its base.
  - ncmncm 7y ago
    For a siphon to work at all requires negative pressure at the top.