Let’s say in the case of someone losing their arm at the shoulder; How does our body rebuild?
In: Biology
Short answer: in the case of losing multiple limbs your body reroutes nothing and in nature you will just bleed to death.
In clinical practice they tourniquet off limbs to reduce blood flow to that area and tie off arteries to stop you from exsanguinating.
In terms of compensating in shock your body tightens your peripheral blood vessels (I.e. your other limbs) to improve your blood pressure and reduces how much you wee to reduce loss. It also increases how hard your hard pumps to improve the amount of blood your heart is pumps each minute.
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