Let’s say in the case of someone losing their arm at the shoulder; How does our body rebuild?
In: Biology
Your body doesn’t reroute flow per se. You will bleed out if a tourniquet is not applied with proper pressure.
For some people who experience shock, a symptom named vasovagal syncope will occur as a pseudo protection mechanism where you body will drastically decrease blood pressure. The pressure decreases because the arteries in your legs dilate and blood pools away from your upper extremities. This is why severing your femoral artery can lead to a quick death.
However, one method your body will technically reroute blood is through your diving reflex. This takes place while mammals and other air breathing vertebrates are submerged and the body focuses the blood to your heart and brain to prolong survival. However this physiological response is also noticed in the same animals near death.
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